Cats eat roaches? I did not know that. That’s even handier than mice chomping.
My little Karelian Bear Doggie never met a bear, never caught a rabbit, was nonplussed by possums playing dead and was outwitted by raccoons but he was a good ratter in his day.
Thus, I assume it was the cat eating them. If you want I'll examine her stool, but I'd rather not.