Ive seen this question come up a number of times and always chuckle at responses- they always cover the full spectrum!
While there are certainly some people that could care less about damaging their interior, I think theyre in the minority on forums like this. For the rest of us who like to keep our boats in nice shape, I think it comes down to the individual dog. Would I let just any dog on my boat? Heck no. My buddy Tique though? Anytime. The hair comes up with a shop vac.