I was thinking of getting a second one - but changed my mind.
I do all of "the work" (feeding, walking, poop pickup, brushing, bathing, vet visits, etc) and DH is pretty much Sully's "toy". He does all the ball throwing and laying on the floor and playing with him, falling asleep on the recliner with him. It's like I'm the waitress.

If we got a second one, I'm afraid I might resent DH for not pitching in more. Maybe I'd change my mind in a year or two but for now - I think Sully will be an "only fur-child".