I think they are more work than a dog honestly. Last Saturday I spent 7 hours cleaning out the cage, all the hidey houses AND rearranging the cage (which took a long time) It was a thorough clean because I have a mite problem currently, which is another thing one should think of. Also, for some reason mine are not quiet at all, they wake me up several times every night, mostly during the wee hours like 4,5,6 am. But for some reason, after all this cleaning and noise and stink, I ABSOLUTELY love them, they make me soo happy. I started out with one and now I have four. For some reason, I never get sick of caring for them. My biggest one I can hug and really cuddly with. The other ones I stick in my robe pocket and pet them and they purr, it's really cute. It's fun to watch them popcorn around and whatnot. I love my guinea pigs, and even though it's a little more work to have more, it's fun to watch them interact and form their own little society.