Definitely stop feeding cooked bones. Raw is fine, but like growler said, cooked bones can splinter into deadly sharp shards.
And about that Friskies . . . . sorry to be a food nag, but no cat should be eating Friskies
. In fact, you'd be hard pressed to find any decent pet food in a grocery store. Please read this link on what a more appropriate diet for a cat would be: http://www.catinfo.org/
As a quick comparison, here are the ingredients in Friskies Indoor dry:
Ground yellow corn, corn gluten meal, chicken by-product meal, meat and bone meal, soybean meal, beef tallow preserved with mixed-tocopherols (form of Vitamin E), turkey by-product meal, powdered cellulose, animal liver flavor, soybean hulls, malt extract, ... salt, dried cheese powder, ....added color (Yellow 6, Yellow 5, Red 40, Blue 2 and other color),....
There isn't a single worthwhile ingredient in this crap. Now check out the ingredients in By Nature Organics chicken canned (available at PetSmart):
Ingredients: Organic Chicken, Natural Well Water, Organic Chicken Liver, ....
Much simpler, no grains, no salt or food colouring or by-products, and most importantly, WATER! Cat's need water with their food. Please reconsider your pets' diets, check out the links, and try to find something better for their health. They'll thank you.