An opened tin starts changing the moment its lid comes off, so storing wet food well is less about the fridge shelf you choose and more about the routine around it: seal it fast, chill it promptly, and serve it in a way a cat actually wants to eat.
Cover It, Chill It, Use It in Days
Get opened food into the fridge straight away, either with a clean tight lid on the tin or transferred to a clean container, which also keeps it from picking up fridge smells or drying at the edges. Work to the timeframe the maker states on the label — commonly a couple of days — and write the day you opened it on the lid if your household opens tins often, because ‘opened recently’ blurs quickly. Treat the maker's limit as a ceiling, not a target: food that smells off, has dried dark, or has sat forgotten at the back of the fridge goes in the bin. When in doubt, err on the side of throwing it away; a fresh tin costs less than a stomach upset.
Serving It So She Eats It
Fridge-cold wet food smells of almost nothing to a cat, and a meal with no smell is a meal refused, so let a portion stand at room temperature briefly or warm it very gently before serving. Serve modest amounts rather than a heaped bowl, and lift what is left after the meal instead of leaving wet food sitting out for hours, where it dries, attracts flies in warm weather and grows steadily less safe. Wash bowls daily in hot soapy water — the film old food leaves behind is unhygienic and, to a cat's nose, deeply unappetising, and it can put her off a perfectly good fresh portion served in the same dish.
Dry Food and the Rest of the Cupboard
Unopened and dry food have their own rules. Keep dry food in its original bag, sealed, in a cool dry place — the bag is designed for the food — and only tip it into a storage bin if that bin gets washed often, because stale fat residue builds up on plastic and flavours everything poured in after it. Note the date on opened bags too, and buy sizes your cat will finish while the food is still fresh rather than the largest bag on the shelf.
When More Than One Person Feeds Her
Storage routines fail quietly in shared households: one person opens a fresh tin because nobody said yesterday's is still in the fridge, or a portion gets served twice because the first feeder forgot to mention it. A named feeding duty solves both — one person owns the morning portion, another the evening one, and each says when it is done. That is the gap KinsLe's Care Teams closes for a fridge rotation: when the morning feeder marks the portion served in KinsLe, the timestamped record shows whoever feeds in the evening exactly which container is open and how long it has left.