its not gross, its nature. in the wild large birds follow herbivores to clean up after them and any scraps they leave behind, and if one of the herbivores dies its a large chunk of free protein, alot easier than hunting bugs all day. thats just the chickens are, natures composters, even if they have been bred out of it for thousands of years. the only thing i would be worried about is if your cat was wearing a flea collar.