when do babies start teething You have a lot of friends in your house dogs cats etc .. Your dog's food is over and you have cat food. Can dogs eat cat food , yes they can . In general, it is OK to eat cat food for a dog if it does not gain excess weight. And excess protein does not cause any problems to your dog. However, cats cannot survive by eating dog food because dog food usually does not contain the necessary nutrients such as taurine and arachidonic acid.