Into the fridge, covered, as soon as it is opened
Wet food is cooked, moist, and rich — exactly what bacteria enjoy once air reaches it. As soon as you have served a meal, cover what remains and refrigerate it rather than leaving the tin or tray on the counter for the next meal. Food from a tin keeps best tipped into a clean glass or plastic container with a lid; if you store it in the tin, use a snug silicone or plastic pet-food lid, since a half-peeled metal lid seals poorly and the open edge can taint the food. Trays and pouches that cannot reseal should be clipped shut or emptied into a container the same way.
Label the container with the day it was opened, on tape or a wipe-off marker. In a busy fridge, yesterday's tin and three-days-ago's tin look identical, and memory is the weakest link in the whole system.
How long opened wet food keeps
Use refrigerated wet food within a few days of opening — two to three days is a sensible working limit for most products, and the maker's own guidance on the label wins if it says something different. Keep it in the main body of the fridge where the temperature is cold and steady, not in the door, which warms every time the fridge opens. If the food smells sour or unusually sharp, has changed colour, or the container has been sitting forgotten at the back, throw it away rather than testing it on the dog. The cost of a discarded tin is trivial beside a night of vomiting.
Unopened tins and trays live in a cool cupboard and are fine until their printed date, but dented, swollen, or rusting tins should be discarded unopened — swelling in particular can signal bacterial growth inside.
Serving refrigerated food without a tummy upset
Cold food straight from the fridge is less appealing and can be harder on a sensitive stomach. Take the serving out a little while before the meal so it loses the worst of the chill, or stir in a splash of warm water, which also releases the smell and makes the meal more inviting. Never microwave food in the tin, and if you warm a portion in a bowl, stir it and test it with a finger for hot spots before serving.
Food served in the bowl starts its own clock. Wet food left sitting out — especially in a warm kitchen or summer garden — should be picked up after an hour or two at most, and what the dog did not eat should be binned, not scraped back into the fridge container. Wash the bowl in hot soapy water after every wet meal; dried-on residue grows bacteria between meals even when the stored food was handled perfectly.
Sharing the system in a multi-feeder house
Most wet-food mistakes are handovers, not ignorance: one person opens a fresh tin because they did not know one was already open, or a second feeder serves food that has been open too long because nobody said when it was opened. Keep one open container at a time, put it in the same fridge spot, and make the opened-on label non-negotiable. If your dog eats part-tins across a day, agree who covers, labels, and bins, and who checks the fridge before opening anything new.
That handover is exactly where KinsLe helps, because Care Teams lets the person who opens your dog's wet food record it on the shared feeding task, so everyone else can see at a glance what is open and when it needs using up.