An occasional bite of dog food won't hurt your cat. But dog food is not a substitute for cat food. They do have many of the same ingredients. But cat food is specially formulated for a cat's needs, which include more protein as well as certain vitamins and fatty acids. A steady diet of dog food can cause your cat to be severely malnourished.
other stuff you should not feed your cat is here (though some are very obvious others are not so obvious)
https://pets.webmd.com/cats/ss/slidesho ... -never-eat
) However, given that the "adoptive" Tom is about 14 years old and semi-feral and our oldest girl was running around the house for a month before she had the confidence to approach, I think anything you might call food is good enough for them..... 
The tail is certainly not wagging the dog as I've had no points credited this week either.
