You should not feed squirrels at all nor any other wildlife. Wild animals regulate their reproduction according to available food sources. The squirrels are perfectly capable of feeding themselves.Dried cat food for squirrels?
No - squirrels are rodents - not carnivores like cats. Give them food made specifically for squirrels. Many stores like Target, Lowes, etc sell ';Critter Mix'; that has corn, sunflower seeds, peanuts, etc.
If you're feeding your cat a cheap grocery store food made mostly of corn it probably won't harm the squirrel but then you're harming your cat by feeding it that garbage. So buy squirrel food for the squirrel and healthier food with meat as the main ingredient for your cat.
There is no harm to give them the food...