This is a great thread, Kathy! I've had both, but dogs are my favorites, hands down. My mom and I have a beautiful black and white border collie, "Hallie." My late brother was very allergic to cats and my mom had been too for years till it slowly went away. By the way, my brother was also allergic to me until I transitioned, then, for the first extended times in our lives, more than a day, we got along very well. When he passed away in July, I was his sister.