Feeding & Nutrition

I found a tin of cat food at the back of the cupboard last spring, pushed behind the tins I actually use, with a date stamped on the bottom I had to squint to read. It was eight months past its best-before, the label faded, the price tag still on from a shop that closed years ago, and I'll be honest, my first thought was that cats eat worse things in alleys and a tin is a tin. That thought is exactly the kind of false economy that ends with a sick animal and a vet bill, and I'm glad I paused before I opened it for Plum that evening.

Best-before and use-by are not the same thing, and pet food is no different from ours in that respect. The date on a tin is the maker's promise about quality and safety up to that point, not a magic line after which the food turns to poison at midnight, but it is also not a suggestion you can ignore forever. A sealed tin of meat in gravy is fairly stable, yet the lining can degrade, the seal can fail in ways you can't see, and once a tin is even slightly swollen or hissing when opened, it belongs in the bin no matter what the date says, because botulism doesn't announce itself with a smell you'd recognise.

What stopped me was remembering a friend whose dog got a nasty bout of food poisoning from an old tin, the kind of sickness that dehydrates a small dog fast and costs a frantic night at the emergency clinic. She'd done the same thing I nearly did, found a tin, shrugged, served it, and spent the next day regretting a penny saved. The maths of "it's still sealed so it's fine" falls apart the moment you're scrubbing vomit off a floor at two in the morning, and the tin she'd saved maybe forty pence on ended up costing her a few hundred in fees and a scared dog.

I opened mine over the sink, not into a bowl, and gave it the three checks I now use for any old pet food. No swelling, no dent that breaks the seal, no sour or off smell when cracked, and the contents looked and smelled like they should. Even then I hesitated, because a date that old means the fats have likely gone rancid even if nothing's grown, and rancid fat is the quiet problem, it won't make a dog keel over but it tastes bad and isn't doing him any good. In the end I tipped it out, rinsed the tin, and recycled it, and fed Plum from a fresh batch I actually trusted.

The real lesson wasn't about that one tin, it was about how I store the stuff I do use. I'd been keeping cat food in a cupboard that gets warm in summer, next to the boiler, which speeds the slow spoilage of both tins and the dry food in its half-zipped bag. Now the tins live in a cool, dark shelf, the open dry food went into a sealed container the day I opened it, and I write the opening date on the bag with a marker so I'm not guessing three weeks later whether it's still good. The "use within a month of opening" rule on most kibble exists for a reason, and a bag left open goes stale and a bit rancid well before it looks wrong.

There's also the question of batches. If you buy a case of tins and one is off, the others from the same production run might be too, so a single bad experience should make you suspicious of its siblings rather than just the one. I keep the batch code noted now, not because I expect trouble, but because if something does go wrong the vet can actually trace it and I'm not describing a label I threw away. Pet food recalls happen, and the people who hear about them in time are the ones who read the emails and check the codes, not the ones who shrug at an old tin.

None of this means throw away everything a day past its date, that would be wasteful and I'm not that person. It means treat the date as the real boundary it is, use your eyes and nose before you serve anything questionable, and store the good stuff properly so you're not finding mystery tins in the back of a warm cupboard. Plum ate her fresh dinner that night without knowing she'd been spared a gamble, and I ate a small slice of humility with my own supper, the cheap kind you learn from without a vet bill attached.

These days I rotate like a small shop, oldest tins to the front where I'll actually see and use them, newest to the back, so nothing gets forgotten and buried until a date becomes a confession. It takes ten seconds when I put the shopping away and saves the whole awkward archaeology of the cupboard dig. The cat is none the wiser about the system, but she eats food I'd serve without a second thought, which is the only standard that should pass for an animal who trusts me with every meal.