Put cat bowls on elevated spots like counters, cat trees, or the washing machine so they're out of reach of nosy dogs. When the cat's food bowl is next to a preferred sleeping and lookout spot, your cat also will be less likely to graze from the floor level dog dish.
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Cats don't need carbohydrates -- but they do need water. If a cat eats dry dog food on a regular basis, they get plenty of carbs and relatively little water. Cats, in general, have a relatively low drive to drink water (perhaps because of their origins in drier parts of the Earth). Cats that eat too many carbs can quickly become overweight, and cats that have too little water can develop urinary tract problems.
Some cats and dog's are really funny when they are begging for food
While cats will sometimes take a nibble from your dog's bowl, the reality is that dogs are more attracted to cat food than the other way around. That's probably because cats are more tuned into the smell, taste, and texture of food.
Raw Pet Food – for dogs and cats - Steve's Real Food