To avoid having to change food from one day to the next, all it takes is three steps. Calculate how many days the package will last based on the amount you already feed, reorder when the remaining supply covers the time needed to get a new package plus a buffer, and keep one unopened package in reserve to open first. This article does not tell you how much food to give: stick to the amount recommended by your veterinarian or listed on the label.
How many days will a package last?
To find out how long a bag of kibble will last, just divide the package contents by daily consumption. Use the amount you already feed each day, without changing it to make the numbers work.
An example for calculation purposes only, not a recommended amount: a package containing 40 scoops, with 2 scoops a day, will last 20 days (40 ÷ 2). If the result is not a whole number, round down.
To find out how much your scoop actually holds, fill it as you normally do and weigh it once on a kitchen scale. This lets you convert the package weight into scoops.
For wet food, count cans or pouches: divide the number in the package by how many you feed each day. If multiple pets eat from the same package, add up their daily consumption and use the total.
Write the opening date on the package. When it runs out, count the days: if your estimate was off, adjust the calculation.
When to reorder: threshold and buffer
When should you reorder dog or cat food? When the remaining days of supply fall to the threshold—the number of days it takes to get a new package at home (delivery or a trip to the store), plus a buffer.
Delivery and trips to the store do not take a fixed amount of time: estimate based on recent experience. The buffer accounts for weekends and holidays, delays, the product being out of stock at the seller, and days when you are unavailable.
The simplest method is one open package and one unopened package. When you open the unopened one, reorder. Your reserve gives you a buffer equal to the time one package lasts: in the example, 20 days for the next one to arrive. If you do not keep a reserve, subtract the days since opening from the package's duration: order when the remaining days fall to the threshold.
Choose a visible reminder. Taking the last unopened package from the stack means it's time to reorder; alternatively, stick a note on the food container with the date by which to reorder.
To avoid relying on memory, you can create a recurring task in the PawsPet app. On the «Tasks» tab (the third icon on the bottom bar), tap the yellow «+» button, choose the date and time of the next reorder, and under «Select task type», choose «Feeding and supplies» in the «General» category. Under «Repeat», set «Every N days» or «Every N weeks» according to your calculation (in the example, every 20 days), choose the duration «forever», and confirm with «Done». Tap «Set» on the bell icon, turn on the alert, choose when to receive it, and confirm; finally, tap «Save».
The reminder is only time-based: it does not track stock, calculate quantities, or place orders for you, so update it if consumption changes. Notifications for the app must be allowed on your phone to receive it.
Rotate packages and keep the label
Rotating packages is simple: when new ones arrive, put them at the back and bring the one with the closest expiration date to the front.
Before buying a large supply, check the expiration date: do not buy more than you will use by then. To work this out, divide the number of days until expiration by how long one package lasts.
For unopened packages, follow the storage instructions on the label. How to store food after opening is a separate topic that we do not cover here.
Take a photo of the label for every product you buy: exact name, variety, size, batch number, and expiration date. The photo helps you buy the same product again, show it to your veterinarian, and have the batch details on hand if a problem arises.
If your usual food is unavailable
If your food is unavailable in-store or online, do not switch foods from one day to the next. That is exactly what the reserve package is for: it buys you time.
Ask the seller when it will be back in stock and compare that date with the days of supply you have left. If the food was recommended by your veterinarian or your pet has specific needs, ask them for an alternative and show them a photo of the label.
If a switch is unavoidable, make it gradually and follow your veterinarian's instructions; do not improvise.
Your five-line stock plan
Here is the template filled in using the scoop example; the numbers are for calculation purposes only.
- Package contents: 40 scoops.
- Daily consumption: 2 scoops.
- Duration: 40 ÷ 2 = 20 days.
- Reorder rule: when I open the unopened package, I reorder (buffer: 20 days).
- Reminder: «Feeding and supplies» task, «Repeat» set to «Every 20 days», with an alert.
Fill it in today with your own details and update it if consumption or package size changes.
