How Long Can Wet Cat Food Sit Out

Cats are notoriously picky eaters, and almost every cat owner has, at least once, had a cat that was particular about their foods. Maybe they insisted on variety, left some of their wet food out for later, or only liked certain flavors and turned their cute little noses up at everything else. 

But how long can wet food sit out? When is it time to open a new can, and when is it acceptable to serve leftovers? 

Cat food is generally okay for between 1-4 hours, depending on the temperature and what kinds of bacteria or fungi naturally occur in your home. You can’t always control what microbes live in your home, so it’s always best to err on safety. Even if you’re inside the 1-4 hour window, don’t serve any foods that look or smell off, and pick up any leftovers in your cat’s food dish if anything seems a little off. 

Cats are predators, which can mean that their stomachs are more sensitive to unwanted bacteria and fungi than other animals, especially since cats are such good hunters that they don’t need to steal carrion from other predators in the wild. 

That means your cat’s delicate palate is an evolutionary feature to help keep them safe. Here’s what you need to know about leaving cat food out, how long cat food is likely to be safe, and what to look for as signs that this food might not be suitable for your cat. 

Why Does Cat Wet Food Go Bad So Quickly? 

There are a few reasons wet cat food tends to go bad, but it’s not that much quicker than any foods we eat. 

The main thing that makes wet cat food vulnerable to going bad is that it’s got a very high moisture content. That means it can be an almost ideal environment for some bacteria and fungi. 

The other reason you should be especially careful with wet cat food is that most cat foods’ powerful scent makes it harder for you to tell when they have or haven’t gone bad. 

We’ll admit it. To a human nose, well… most cat food smells pungent but not that much like food. So the subtle changes in scent that could tell us when our food goes bad will be much harder to detect in your cat’s food. 

Unless your cat has an alternative food source, it might eat food that smells slightly. It’s better than nothing, even when they can smell that something is off. Only some cats will be able to smell the danger, too. It might still smell like food to them, with no warning that something might be wrong. 

What Happens If My Cat Eats Spoiled Wet Food? 

The biggest risk to your cat if they eat spoiled wet food is gastric distress or infections. Their gut bacteria might be unable to effectively eliminate the harmful bacteria, which can cause serious problems. 

A simple case of food poisoning might resolve on its own, with good food and hydration support from you to keep your cat healthy. 

But more severe cases of food poisoning can require treatment with antibiotics, followed by probiotics to restore their natural gut microbiome. Even more severe cases might require laxatives or other treatments to get the contaminated food out of your cat’s body as quickly as possible. 

While severe cases of food poisoning from wet food are relatively rare, they can be severe and put your cat at risk of needing intensive medical care. 

How Should You Serve Wet Cat Food, Hot Or Cold?

If you have a picky eater, you might be wondering how best to serve your cat’s wet food to them. 

The truth is that most cats will accept room temperature or even cold, wet food without a problem. But some cats need a little extra temptation. Warming up wet food in the microwave can help make the scent more appealing. 

Remember, if you warm up cat food, your goal is to make it warm, not cook it. You want to lose as little moisture as possible, and some of the vitamins and nutrients your cat needs might be heat-sensitive, so you don’t want to heat it for too long. 

Ultimately though, the safety of the food doesn’t change whether you heat it or not. So, you can serve your cat’s wet food at whatever temperature they like! 

Things To Consider

Not all wet food is created equal, and it’s important to ensure you’re feeding your cat a good balance of nutrients and moisture for their age, weight, and health restrictions. It’s a good idea to work with your vet to ensure the foods you offer are high quality and well-suited to your cat’s needs. 

Sometimes that might mean that you need to feed your cats separately or that you need to give your cats different foods if they have different needs. 

If you suspect your cat has food poisoning, contact your vet immediately for advice on what to do next. They might have specific foods or hydration treats that can help your vet recover or recommend coming in for a complete exam to provide medications or specific foods that will keep your cat more comfortable until they recover. 

Even if you can’t always offer the best foods for your cat, we’ve all fed cheaper foods from time to time; you can ensure that food is at least safe and as healthy as possible for your feline friend. Refrigerating opened cans of food between meals and picking up servings that have sat out for too long are simple ways to keep your cat as safe and healthy as possible!