My cat is 11 years old, and he is my sun and stars? I am his sun and stars, as well. I also have an 8 year old female cat. We are a tight threesome. I thought today about going to the shelter and adopting a senior dog. My cats are not unaccustomed to dogs. We have always lived in apartments, and the neighbors have always had dogs in the yard. But first and foremost I don't want my boy to feel jealous. I know if I brought home another cat he would be jealous. But I'm not so sure if he would feel jealous about a dog. What do you think? Thank you.