Stocking Pet Supplies When You Can Be Cut Off: Sizing to the Boat, Not to the Storm

Size the reserve to the delivery calendar you actually live by: find the longest published gap between deliveries, add one missed run, and hold the usual two-week hazard reserve on top. Then check that number against the manufacturer windows that limit how far ahead you can buy. Purina publishes two to three months for opened dry food, and Royal Canin one to two for a bag that does not reseal, so a long reserve is several unopened bags in dated rotation, kept inside the heated house.

Every published pet preparedness standard answers one question: how long might this last? Two weeks, a week, several days. Those are conservative estimates about a hazard of unknown length. Households on an island ferry, a seasonal road, or a barge or air freight route live with a second question: when does the next delivery arrive? Someone prints the answer. It is a timetable, not an estimate.

Where This Page Fits

This page sizes supplies to a transport schedule of known length and to the manufacturer windows that cap it. Three other pages cover the rest:

• Long-term pet food and water storage sizes a reserve against a hazard of unknown length and covers shelf life, containers, water and rotation.
• Emergency food and water storage sizes the lighter kit you carry out the door.
• Weeks-long outage plan sizes against a power restoration timeline.

If a storm is coming, start with those.

What the Authorities Publish

None of the sources cited here names a pet food or water figure longer than two weeks, including the authority whose reasoning is closest to an isolated community’s. That is a statement about the sources on this page, not proof that no such document exists.

Hawaiʻi Emergency Management Agency runs a program called 2-Weeks Ready. It says Hawaiʻi is the only island state and relies on shipping for most of its food and supplies, so people should stock two weeks of emergency supplies in case a disaster damages ports and supply chains. For pets it says: “Make sure they have enough pet food and water to last two weeks.” It also points owners to medication, hygiene and comfort needs. The stated hazard is damaged ports and supply chains, so this is a hazard clock, not a delivery calendar.

Alaska’s Division of Homeland Security and Emergency Management publishes a seven-day kit with pets inside it. Its 12-week Emergency Kit Guide says your family will need supplies for “at least 7 Days,” and Week 11 lists pet food and pet supplies. Its Disaster Supply Kit for Pets says seven days of food and water, kept in a watertight container. Its Ready Pets handout and Pet Emergency Go-Kit card both say “seven days or more.” Seven days is where the agency starts counting, and it names no upper figure. Its 24-week calendar spreads the pet items across Weeks 1, 2, 3, 11 and 12 (food, leash or carrier and extra ID tags, one gallon of water per pet, medical records and any special medication, litter and box, extra water, pet first aid kit) and ends with a rotation instruction: begin rotating water and food stores, and continue each month so fresh stores are always on hand. That is a purchasing calendar for a seven-day kit. It does not size a reserve to a delivery interval, and neither does anything else cited here.

FDA publishes the shortest figure: at least a one-week supply of food and fresh water. It appears under “What to take,” in a list introduced by the words “When you evacuate your home, be sure to take:”. That sizes the kit you carry, not the reserve you keep.

CDC sets food, water and medications at two weeks each on its Build a Pet Disaster Preparedness Kit page (dated April 9, 2024). One line under the same heading runs longer: a “1-month supply of flea, tick, and heartworm preventative.” CDC gives no reason for the difference. For a household on a long delivery interval, this is the one item a flat fourteen-day rule under-buys. Our long-term storage page makes the same point about the same list.

Authority	Published pet figure	What it sizes
Hawaiʻi Emergency Management Agency	Two weeks of pet food and water	A home reserve, with damaged ports and supply chains as the stated hazard
Alaska Division of Homeland Security & Emergency Management	A seven-day kit with pet food, a gallon of water per pet, leash or carrier, litter and box; “seven days or more” on two of three pet handouts	A household kit, plus three standalone pet handouts
FDA	At least a one-week supply of food and fresh water	What you take when you evacuate
CDC	Two weeks of food, water and medications; a one-month supply of flea, tick and heartworm preventative	A pet disaster kit

The standard and the timetable measure different things. The hazard reserve is what you hold back for the week the boat cannot sail. The transport interval is what you buy on an ordinary week when nothing has gone wrong. Build only the first and you will be shopping in a place with no shop. Build only the second and one cancelled sailing eats your margin.

What a Published Resupply Calendar Looks Like

Most people have never opened one, which is why the numbers surprise them.

Matinicus Isle, Maine

Matinicus Isle is an inhabited island roughly twenty-three miles off Rockland, served by a Maine Department of Transportation vehicle ferry with a stated crossing time of one hour and forty-five minutes. Maine DOT notes there is no terminal on Matinicus. As of August 19, 2026, its published 2026 table listed 40 dated trips, and its ferry page says there are currently 40 trips scheduled.

The trips are unevenly spread. Counted from Maine DOT’s dates: one in January, one in February, two each in March, November and December, and four or five in each month from April through October. Reading consecutive dates, these are the gaps of four weeks or more:

From	To	Days between
January 7	February 20	44
February 20	March 20	28
November 13	December 15	32

The counts and intervals are this site’s arithmetic on Maine DOT’s published dates. Maine DOT does not publish interval figures.

Forty-four days is an ordinary, nothing-has-gone-wrong interval between vehicle ferry trips to an inhabited American island. It is more than three times the most conservative pet food and water figure cited above. Four more details change how you plan against it:

• The legal floor is low. Under 23 MRSA section 4401, as amended by PL 2025, c. 229, service to Matinicus “must be at least 12 times per year, with additional service authorized as agreed upon by the residents of Matinicus Isle and the department.” The 40-trip schedule is a departmental decision above that floor. Twelve is what is guaranteed.
• Extra trips are not guaranteed. Maine DOT publishes a process for requesting additional trips and says they depend on factors including full capacity, tides, weather and crew availability. Special trips at a published charge are also possible.
• The printed calendar is provisional. Maine DOT says the schedule is subject to change without notice and advises travelers to contact the Rockland terminal office the day before a trip to confirm it is departing.
• Reservations run on their own clock. Maine DOT says they may be made up to 3 months in advance.

Beaver Island, Michigan

The Beaver Island Boat Company runs the ferry between Charlevoix and Beaver Island. As of August 19, 2026, its posted 2026 schedule showed month calendars for April through December. It does not say when its season starts or ends, so the operator or the Beaver Island Transportation Authority is who to ask, not a guess.

What the operator does state applies to every ferry-served household. Rates, schedule and vessel are subject to change without notice, and all trips are weather permitting. It also says one of its two vessels will go to dry dock in October. A schedule is a plan, and a vessel is a machine that needs maintenance.

The freight page matters even more if you plan to order pet food online. It sets out rules for grocery and delivery services, including: “Grocery bags, paper or plastic ARE NOT an acceptable packaging to ship freight.” It also says orders that show up after freight delivery hours will be refused. An order can fail because it arrived at the dock after hours in the wrong packaging, and then the next boat is whenever the next boat is. Sacks of kibble and cases of cans are heavy and bulky, so read the carrier’s freight rules before you size the order.

Alaska is a different structure

Alaska DOT&PF’s Fast Facts, footed January 2023, says 82% of the communities and FAA-recognized locations in Alaska are not accessible by road, 251 communities are exclusively accessed by air, and 142 receive state-provided air transportation infrastructure because air travel is their only access. Those figures are dated 2023 and may have changed.

For those communities the resupply mechanism is often not a passenger timetable. The U.S. Postal Service Office of Inspector General, in a white paper dated November 28, 2011, describes the Alaska Bypass program. It says orders have a 1,000-pound minimum weight, so “the recipients in these remote locations are usually retail merchants,” and that airlines deliver Bypass orders directly to the recipient’s door. The minimum is still current Postal Service policy: the Domestic Mail Manual (pages footed Updated 7-12-26) points at Handbook PO-508 for Alaska Bypass requirements, and PO-508, effective March 2012, says an order to a single addressee must weigh a minimum of 1,000 pounds. PO-508 is a Postal Service handbook, not a regulation.

The practical reading is this site’s own, not the OIG’s: in a community supplied this way, your household’s resupply clock is very often the local store’s ordering cycle. Ask the store manager when it orders and restocks before you need the answer.

Do not repeat the statistic that Alaska imports 95 percent of its food. Alaska Public Media reported on November 20, 2025 that food systems experts cannot trace it to a verifiable source. Rachel Lord of the Alaska Food Policy Council said of it, “it is made up.” Economist Mike Jones said the problem is that there are no units attached.

How to find your own calendar

1. Name your actual supply route. State ferry, private ferry, barge, winter road, air freight, mail. Most households have more than one, with different calendars.
2. Find the operator’s published schedule for the current year. A state DOT, boat company, borough or village corporation is the publisher. A search result summarizing one is not.
3. Write down the longest gap. Not the average. The 44-day Matinicus gap disappears in an average.
4. Add the cancellation margin. Operators reserve the right to cancel for weather. One missed sailing on a monthly schedule doubles your interval.
5. Find out how freight works separately from passengers. Packaging rules, weight minimums, dock hours and refusal policies are published apart from the timetable, and they are what actually stops a pet food order.
6. Ask the store when it restocks if goods land at a merchant rather than at your door.

The Ceiling on a Long Reserve

The natural response to a 44-day gap is to buy three months at once. Three published windows say that does not work the way you picture it. They come from the industry body and two manufacturers, and they describe the food, not the emergency.

AAFCO says in its consumer FAQ, in an answer about pests in pet food, that best-by dates are “usually 6 or 12 months beyond the date of manufacture on dry pet food products.” That is a description of what dates typically say, not a keeping-time instruction. The window is measured from manufacture, not purchase, so a bag that spent months in a warehouse and on a boat has already used part of it. AAFCO also advises consumers to check best-by dates, not to leave open bags of pet food sitting for months, and to empty, wash and dry reusable storage containers between batches. Our long-term storage page uses roughly 12 to 18 months as a planning estimate for unopened kibble. The two are different measurements and can both be true, so plan from the date printed on the bag in front of you.

Purina (dog food storage guide, updated 6/5/2025) says: “dry food, once opened, should be used within two-to-three months if properly stored, while wet food should be used within three days if sealed and refrigerated.” It says the printed date applies only to food in unopened packaging. Its instructions for opened dry food are to keep it in the original bag, squeeze out extra air, seal it with a clip, and for extra protection put the bag inside an airtight metal or plastic bin. It also warns against dumping new food over old: use the old food and wash out the container first.

Royal Canin US says dry diets should be stored in their original bags and resealed between feedings, and most small bags include a resealable zipper. It gives a window only for the other case: if the bag does not reseal, keep it in the original bag inside a dry, airtight plastic or steel container with a lid, and use it within 1 to 2 months. It attaches no window to a bag you can reseal. The whole bag goes inside the container; Royal Canin does not tell you to pour the kibble out.

Publisher	Published window	What it measures
AAFCO consumer FAQ	Best-by dates usually 6 or 12 months after manufacture on dry food	Where the printed date typically falls
Purina	Opened dry food within two to three months; opened wet food within three days if sealed and refrigerated	Opened package
Royal Canin US	1 to 2 months for a non-resealable bag kept in an airtight container; no window attached to a resealable bag	Opened package of the company’s own food
FDA	No duration; temperature should be less than 80 F for dry food and unopened canned food	Storage conditions

No one averages these, because an average would be a number nobody published. None of the publishers wrote about resupply intervals, so putting their windows next to a ferry timetable is this site’s own join. What follows from it:

• Buy more, smaller unopened units. The biggest bag is the one that spends the longest time open.
• Date every unit on arrival, and write the printed best-by date on the outside. FDA says to keep the product name, manufacturer, UPC, lot number and best-by date available in case of a recall, and to tape them to the outside of a container if you decant.
• Open in the order you will finish them, not the order they are stacked.
• If you decant, put the whole bag in. FDA says to put the entire bag into the container rather than pour kibble directly into it.
• Never top up an old container with new food. Finish the old food, wash and dry the container, then refill.
• Do not plan the reserve to run out on the delivery date. A cancelled sailing is normal, and the margin absorbs it.

For turning rotation into a habit, see the pet emergency kit rotation checklist.

Cold Is a Hazard to the Reserve

If you live somewhere with a long cold season, an unheated shed, porch, outbuilding or truck bed can look like free storage. Every published source cited here points the other way.

• Royal Canin says: “It is not recommended to freeze the pet food as this draws out the moisture in the kibble and, upon thawing, can cause mold.”
• Hill’s Pet (guidance with a byline dated October 01, 2015) says store unopened cans where the temperature is between 50 and 100°F and not to freeze canned food, because it can change the texture and taste. Fifty degrees is the only lower bound cited here.
• Hill’s on garages: “Storing your cat or dog’s food in an uncontrolled environment - such as a garage or outdoors – is not recommended.” An unheated garage is uncontrolled in the direction people forget, and an attached garage in a hot climate is uncontrolled in the direction they remember.
• Hill’s on dry food is scoped to its own Science Diet and Prescription Diet bags: store them in a cool, dry environment under 100°F to prevent destruction of vitamins and oxidation of fats, keep them in the original bag, which provides a fat barrier, and keep the bag off the floor to reduce potential infestation.
• FDA publishes a ceiling and no floor: dry pet food and unopened canned food should be kept cool and dry, at less than 80 F. So the cold question is answered by manufacturers, not a federal agency. AAFCO’s FAQ does not address freezing, cold or refrigeration.
• Alaska’s Emergency Kit Guide says “Do not allow canned goods to freeze!” That is written about the family’s food, not the pets’, but it points the same direction.

USDA’s Food Safety and Inspection Service (last updated Oct 24, 2024) says cans that freeze accidentally can present health problems, swollen cans must be discarded, and cans that have thawed and refrozen are not safe. It also says never to keep canned goods above or beside the stove, under the sink, or in a damp garage or basement. That guidance is about food for people. The FSIS page goes on to a salvage procedure for frozen cans, and it is not repeated here because it was not written for animal food. If a can of your animal’s food has frozen, do not judge it yourself. Discard any swollen can, and ask your veterinarian and the manufacturer’s consumer line about the rest.

This site’s own conclusion, not any source’s: an unheated outbuilding is not overflow pantry in either direction, and a long-interval reserve should live inside the heated envelope of the house. If it will not fit, the reserve is too big for your storage. Use a smaller reserve turned over more often, not a colder one.

Source	High bound	Low bound	Freezing
FDA	Less than 80 F for dry food and unopened cans	None published	Not addressed
Hill’s Pet	Dry Science Diet and Prescription Diet bags under 100°F; unopened cans 50-100°F	50°F, for unopened cans	Do not freeze canned food
Royal Canin US	Not published as a number	Not published	Not recommended for dry food; can cause mold on thawing
AAFCO consumer FAQ	Not addressed	Not addressed	Not addressed
Alaska Emergency Kit Guide	Cool, dry area	Not published as a number	Do not allow canned goods to freeze (family food)
USDA FSIS (food for people)	Below 85 F is best	Not published as a number	Frozen cans covered in detail

Three Things Other Pages Own

Medication

A long delivery interval does not change what the law permits. The American Veterinary Medical Association, in a FAQ written for veterinarians, says that when a veterinarian-client-patient relationship exists, it is the attending veterinarian who determines the treatment plan and may authorize or decline a refill at their discretion, not the pharmacy. That answer is addressed to veterinarians and concerns an internet pharmacy refill request. It does not say a client may ask for any quantity. It does show who decides, so the instruction is a phone call: contact the practice before the season closes, give them your real delivery calendar, and let them size it. Do not ration, split or stretch a prescribed medication to make a supply last.

For what bounds a reserve of a controlled medication, see why you cannot stockpile controlled pet medications. For emergency refill provisions and the refill-too-soon problem, see emergency and early pet prescription refills.

Pooling supplies with neighbors

Our page on splitting pet emergency costs with neighbors covers what must never be shared and how to run a co-op. A shared transport calendar adds one caution: four homes on one ferry route are on one interval and reach the empty week together. Split the buying and the storage, not the reserve.

Litter

The litter box options page owns the sizing method and notes that no authority it checked publishes a litter-per-day figure. A long interval changes the multiplier and nothing else. Litter is dense and bulky, so it competes with food for freight weight and volume. Weigh and measure before you order, and check the carrier’s packaging and dock rules.

The Checklist

Run it once a year when the new schedule is published, and once a season after that.

Establish your calendar

• Name every route your supplies travel: ferry, barge, winter road, air freight, mail, and the local store’s restock.
• Get the operator’s published schedule for the current year from the operator’s own site.
• Write down the longest gap, not the average.
• Note whether the schedule is a legal floor or a discretionary level of service. On Matinicus, the statute guarantees at least 12 trips a year and the department currently schedules 40.
• Read the cancellation and weather language, and add one missed run to your longest gap.
• Read the freight rules separately: packaging, minimums, dock hours, refusal policy.
• Ask the local store when it orders and restocks.

Size the reserve

• Start from the hazard floor of two weeks of food and water per animal.
• Size flea, tick and heartworm preventative on its own line. CDC lists a one-month supply.
• Size to your working interval, and hold the hazard reserve on top of it rather than counting it twice.
• Scale by animal. Two weeks for one cat and two weeks for two dogs and a cat are different shopping lists.
• Do not plan the reserve to run out on the scheduled arrival date.

Respect the ceiling

• Buy several smaller unopened packages, not one large one.
• Read the printed best-by date on arrival and plan from it. AAFCO says those dates are usually 6 or 12 months from manufacture on dry food.
• Write the printed date large on each unit and note the day it arrived.
• Open one package at a time, in the order you will finish them.
• Plan to finish an opened bag within one to three months, the range the two manufacturers publish.
• Keep food in its original bag inside the sealed container.
• Never top up an old container with a new bag.

Store it where it will not be ruined

• Keep the whole reserve inside the heated envelope of the house.
• Do not use an unheated garage, shed, porch, outbuilding or vehicle.
• Keep it below 80 degrees Fahrenheit, FDA’s stated ceiling for dry pet food and unopened canned food.
• Do not freeze it.
• If a can has frozen, do not judge it yourself. Discard any swollen can and ask your veterinarian and the manufacturer about the rest.
• Store off the floor in a container that seals, and wash and dry the container between bags.

Hand off

• Medication: call the practice before the season closes with your real delivery calendar. Do not ration or stretch a prescription.
• Litter: use the sizing method on the litter box page, then check the result against your freight limits.
• Pooling: remember every household on one route empties at the same time.
• Water: the long-term storage page owns the water arithmetic, containers and rotation.

Every year

• Re-download the schedule when the new year’s is published. The gaps move.
• Re-check your longest-gap number against the new table.
• Confirm the operator has not changed freight rules, dock hours or vessels.

What No Published Source Covers

• No source cited here names a pet food or water duration longer than two weeks. The only open-ended phrasing is Alaska’s “seven days or more” on two of its three pet handouts, and an open end is not a number.
• No source cited here sizes an animal’s supplies to a transport schedule. Alaska’s 24-week calendar is the closest, and it is a purchasing calendar for a seven-day kit. The join between a ferry timetable and a pet reserve is this site’s own.
• The Alaska Bypass 1,000-pound minimum is stated in a Postal Service handbook, not a regulation cited here.
• Beaver Island’s ferry season is not stated on the posted schedule.
• Several Alaska documents carry no printed edition date, and the Fast Facts sheet is footed January 2023, so treat their figures as dated.
• No veterinary or pharmacy body cited here publishes client guidance for a fixed resupply schedule, as distinct from a declared emergency. That is why the medication advice above is a phone call, not a rule.

Where to Go Next

This page is the resupply-schedule spoke of our pet evacuation kits hub.

• The household reserve itself: long-term pet food and water storage.
• Packing to leave: emergency food and water storage.
• The trigger is an outage: the weeks-long outage page.
• Not sure whether to stay: shelter in place or evacuate.

Then do the one thing that pays off most, in fifteen minutes. Open your operator’s schedule for next year, find the longest gap, write that number on the same paper as your veterinarian’s phone number, and buy to it.