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Can Cats Eat Dog Food? [Once Vs. Often]

Can Cats Eat Dog Food? [Once vs. Often]

You’re probably here because you have a cat who won’t stop eyeing your dog’s food. Maybe they even snuck a few bites — or stole the entire bowl from under their nose. But can cats eat dog food? We all know cats are curious, but will this food curiosity kill your cat?


Not necessarily.


You may have noticed that your cat starts eyeing your dog’s food once they’re done chowing down on their own breakfast. The food smells sort of similar. It looks sort of similar (just a bit bigger bites). Your cat obviously wants to give it a try. But should you let them? Can cats eat dog food?


The short answer is: Yes, but only for a very short amount of time or in emergency situations.


Why is Dog Food Bad for Cats?

Cats and dogs have different nutritional needs and dietary requirements. Dog food is missing a lot of the nutrition that cats need in order to remain healthy and active.


Cats are obligate carnivores, meaning they are required to eat meat. Dogs are omnivores, meaning they can digest meat, grains, and vegetables. For this reason, a canine’s food isn’t solely focused on meat. While their food may look and smell similar, there’s actually a big difference in the ingredients and nutrients.



What Ingredients Are in Cat Food?

The first ingredient in cat food should always be a named protein source. This is the most important ingredient to look for on the package. It should never just say “meat.” Instead, keep an eye out for chicken, turkey, lamb, salmon, and even chicken liver.


Another mandatory ingredient for cats is taurine since cats don’t produce enough of this amino acid on their own. A diet deficient in taurine leads to heart disease and retinal degeneration in cats, so most cat food has included taurine for the past few decades. Research has shown that the minimum daily taurine requirement for adult cats was about 10 mg per body weight/day is sufficient.


Cats are obligate carnivores and do not need carbohydrates. Still, most dry food will still contain carbohydrates, known as “fillers” that hold the ingredients together. While it’s impossible to avoid cat food with these fillers, there are some that are a bit superior.


Avoid cat food with grains if possible, specifically corn and wheat. Instead, look for carbohydrates like sweet potatoes, potato starch, and green peas. If you can, feed your cats canned food instead, these tend to avoid carbohydrates altogether.


A cat’s food also contains fat sources such as chicken fat or oils, as well as vitamins and minerals, including Vitamin C and Vitamin E.



What Ingredients Are in Dog Food?

Like cat food, dog food also contains protein, usually poultry or fish. This is usually the top ingredient. Dog food also contains a lot of carbohydrates from plants and grains. Dogs can easily covert the sugar from starches into usable energy. 


Because dogs are a bit more active than cats, their food also contains a lot more fat, helping them maintain a healthy body temperature and control inflammation. Omega-6 fatty acids are also essential for a healthy skin and coat.


Dog food does not contain taurine, one of the main reasons that cats cannot survive off of dog food for a long time. The vitamins found in dog food are usually A, D, E, and K, as well as Vitamin C. The minerals found in dog food provide skeletal support and help with muscle functions.


Related: Is Organic Dog Food Better?


What Happens if a Cat Eats Dog Food? (Once vs Often)

Cats cannot survive on a dog food diet alone long term. Without the right protein and taurine, cats will lose their muscle mass and become lethargic. They will eventually develop problems with their vision, digestion, heart function, and immune system. For purebred queens that may have a litter of kittens in the future, taurine is needed for proper fetal development.


But can a cat eat dog food here and there?


Can Cats Eat Dog Food For a Day?

You may be clicking on this article because your cat already snuck some dog food here and there and you’re hoping it hasn’t harmed your feline companion in some way. Don’t worry. Cats can eat dog food for a day, whether it be an emergency situation or because your cat just wants to show the dog who’s boss.


Related: How to Calm an Aggressive Cat


Dog food isn’t inherently dangerous to cats short term; it just isn’t nutritious. Your cat won’t become ill from scarfing down some dog kibble, but keep in mind that the sudden change in diet could cause them to have an upset stomach, which may lead to diarrhea or vomiting.



How to Stop Your Cat from Eating Dog Food

You can own a cat and a dog without them chowing down on each other’s food. You just have to make a few adjustments to your feeding routine and setup.


Cats are not pack animals and don’t mind eating alone. In fact, some cats may prefer it. It could greatly reduce the risk of them claiming the dog’s leftovers if you give each pet their own feeding space a bit further from each other. When your cat realizes where their feeding occurs, they will naturally hang out around that area while waiting for their next meal. Pretty soon your feline should forget all about the dog’s bowl across the room.


Try giving your cat treats in that area as well, encouraging them to stay in that area in hopes that more food is coming their way. If your cat still decides to venture to the dog’s eating area, remove them immediately and even say “no” in a sharp tone. When they start to see that hanging around the dog’s area gets them nowhere they won’t be so fond of that place as much as their own.


If you have a dog that’s a bit of a pushover, try raised food bowls. This will make it more difficult for a cat to budge their way in while the dog is eating since they can’t reach the food as easily.


So Can a Dog Eat Cat Food?

Cats are a bit more particular than dogs when it comes to the food they can eat. Still, dogs thrive when they have a more varied diet, which cat food can’t really provide (since it has such high protein). And even though dogs may not seem too picky about their diet, eating a lot of cat food can lead to gastrointestinal problems, sickness, and diarrhea. Long-term cat food scarfing can also lead to obesity and organ inflammation.


While dogs should definitely not be fed a cat-food heavy diet, dogs can eat some cat food and it’s highly unlikely it would be fatal.



How to Stop Your Dog from Eating Cat Food

This might be a bit easier to deal with than cats, since — let’s face it — cats do whatever they want. Especially if they know they won’t be caught. Cats are also a bit more mobile, able to jump onto surfaces they shouldn’t and open things they shouldn’t.


If you want to immediately stop your dog from having access to cat food, keep the bag of dry food in a high up cabinet or on a high up shelf. You can also start feeding your cat on higher surfaces, like atop a cat tree or built-in cat shelf. This would also become your cat’s safe space and food territory, making them less likely to venture down for some of the dog’s food.


You can also try implementing automatic feeders. Some automatic feeders can only be accessed by a pet with the right collar. That means your other pet won’t be able to activate the feeder, ensuring they’re not given an opportunity to try out the wrong food. This is especially useful for cats since some will eat slowly throughout the day and you don’t want the leftover food to be consumed by your dog.



Final Thoughts

Don’t panic if your cat has nibbled on some leftover dog food or your dog has eaten a bowl of cat food when you forgot to pick up a new bag at the store. In these one time instances, your pet should be fine. But cats should never be fed dog food long term, or vice versa, since they are missing ingredients and diet staples that help them stay healthy and active. Remember: cats need protein and taurine for a variety of functions.


And if you think they’ve eaten a fair amount of the wrong food, don’t hesitate to bring them to the vet. Read more here.

Olivia Richman

Olivia Richman is a seasoned editor and writer who has produced content for a variety of industries, including esports, video games, technology, health, finance, pets and — of course — CBD. When she is not managing content, Olivia can be found hanging out with her unphotogenic cat, Simba, or traveling for the Pokemon TCG.

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