Originally Posted by LuckyRescue
Most dogs find cat food irrisistable because of the very high protein content - the same reason they also eat "Kitty Tootsie Rolls" from the litter box!
The only way to keep your dog from eating it is to keep it out of reach.
A steady diet of cat food would not be good for a dog, but eating it occasionally may merely cause loose stools.
The weight gain from eating cat food is harmful also. Different species, different diet.