I bought one of those big battery powered mice that runs around all over and changes direction and backs up bla bla, anyway all the boy cats chase it around but won't touch it, the stray cat is the bravest one of them, he managed to tip it over once. The funny part of all this is the girl cat just lays there and watches all the boy cats act like dummies lol. Missy, the old cat couldn't care less about the whole deal. Its funny how much differently male cats act than female cats sometimes. I was worth a good laugh watching all the cats act so goofy.