In the beginning
- Cats don't instinctively drink water because, in the wild, they get a great deal of water indirectly by eating their prey (birds, mice, etc.). Thus, domestic cats are chronically dehydrated unless they eat canned food with a much higher water content (e.g., 70 - 80% water vs. only 10% in dry food).
- Dry food is notorious for weight gain in cats, because dry food is high in carbohydrates, necessary to bind the food into kibble, and thus higher in calories as well. A lot of dry foods profess to be grain-free, but they merely substitute starchy vegetables (potatoes, peas, etc.) for grain.
- Cats, unlike dogs, are carnivores (meat eaters), whereas dogs are omnivores (can eat animal or plant food sources) ... cats' digestive systems aren’t well suited to digesting carbs/plant material.
- Cats who consume exclusively dry foods often suffer from obesity, urinary tract disorders, kidney disease, high blood sugar, and diabetes.