Thanks for the comments... and I didn't put the cat in contact, she just came up out of nowhere (the neighbor's yard, I think). But I was watching very closely, and know I can trust those two particular animals. Toby & Mona completely ignore the cats/dogs, whereas I know Delilah feels threatened, so they're not allowed near her. Don't worry, I am experienced in having multiple species co-exist! Between my and my roommate's pets, the circle of life is fully represented in our house.