Published by: Ingrid King. Last Updated on: July 22, 2023 by Crystal Uys


Last updated April 2021

Grocery and pet store shelves abound with a dizzying array of dry cat food. For decades, kibble has been the preferred choice for most cat owners. After all, the bags say it’s “complete and balanced,” it’s easy to feed, and most cats seem to like it. Unfortunately, dry cat food, even the high-priced premium and veterinary brands, is the equivalent of junk food for cats. Feeding dry food to cats is no different than feeding sugared cereals to kids.

The 6 Downsides of Dry Cat Food

1. Cats are obligate carnivores

This means they need meat to survive. They cannot get enough nutritional support from plant-based proteins such as grains and vegetables, because, unlike humans and dogs, they lack the specific enzyme that processes plant-based proteins metabolically. They need little or no carbohydrates in their diet. Feeding foods high in carbohydrates leads to a number of degenerative diseases, including diabetes, kidney disease, and inflammatory bowel disease.

grey cat eating meat
Image Credit: Chendongshan, Shutterstock

2. Free choice feeding leads to obesity

Many pet owners feed dry food because it can be left out during the day without spoiling while the cat is left at home alone. This method of free choice feeding is one of the leading contributors to obesity in cats.  Cats, by nature, are hunters, and it does not make sense that they should need access to food 24 hours a day. Feeding two or more small meals a day mimics their natural hunting behavior much closer. By feeding controlled portion sizes rather than leaving food out all day long, calorie intake and weight can be controlled without the cat going hungry.

3. Dry food is the leading cause behind most urinary tract problems

Dry food is the leading cause of most urinary tract problems in cats. While cats who eat only dry food will generally drink more water, they still don’t get enough moisture to support all their bodily functions. These cats essentially live in a constant state of low level dehydration, which can lead to bladder and kidney problems.

red cat is being examined by a veterinarian
Image Credit: YULIYA Shustik, Shutterstock

4. Dry food can lead to diabetes

Due to the high carbohydrate content, dry food dumps unnaturally high levels of sugar into the cat’s bloodstream, which can lead to an imbalance of its natural metabolic process. In extreme cases, this can, and often does, lead to diabetes.

5. Dry food does not clean teeth

The myth that dry food cleans teeth is one that just won’t die. Most cats don’t chew their kibble long enough for any of the scraping action that is the theory behind this myth to kick in. What little they do chew shatters into small pieces. Some pet food manufacturers offer a “dental diet” that is made up of larger than normal sized kibble to encourage chewing, but in my years at veterinary practices, I’ve seen many cats swallow even those larger size pieces whole. Additionally, dry food leaves a carbohydrate residue in the cat’s mouth that actually encourages growth of tartar and plaque.

Veterinarian examining teeth of Persian Cat
Image Credit: dididesign021, Shutterstock

6. Eliminate all dry food from your cat’s diet

The one best thing you can do for your cat is to stop feeding dry food and feed a meat based, grain-free raw, homemade or canned diet which is consistent with the biological needs of a carnivore.

You may find that some cats are very difficult to wean off dry food, further supporting the junk food analogy. They’re literally addicted to the carbs and additives used in these diets. During the manufacturing process, substances called “digests” (fermented by-products of meat processing with no nutritional value) are sprayed on the outside of the kibble to make it more palatable to the cat.  Most cats wouldn’t touch dry food if it wasn’t for these flavor enhancers.  For these hard-core addicts, you will need to transition them to a healthier diet somewhat slowly.  Never let a cat go without food for more than 24 hours.

Featured Image Credit: Crepessuzette, Pixabay

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