I like both dogs and cats, I am not too picky. Small to medium sizes are the best. I enjoy playing with them and taking them for a walk. Bonus, it helps me to get my own exercise as well. I have had a dog myself, and know what it is like to have to leave them for even just an overnight, it sucks so bad. It is great to be able to have a trusted someone to watch over the pets and not have to worry about it.