I think having three dogs would be good for the reasons Angels3 mentioned. I think you have to have the right dogs for this though. A dog behaviorist told me that most dogs do best in groups of even numbers. One example of this sticks out in my mind... We have playgroups at the shelter so dogs can run off energy with their doggy friends and be more content once they get back to their kennels. One time we had Danny (dalmatian) playing with Homer (pitbull). They often played together and got along great every session. There was another dog, Nadia (malamute) who had been in a playgroup with both Danny and Homer seperately and got along with each of them every time. We decided to bring Nadia and one other dog in so all four could play together. We brought Nadia in first and she jumped into the play with Danny and Homer. Before we could even get the fourth dog out, Danny had mounted Nadia and was being very dominant and mouthy. Nadia didn't want any part of it and snapped back toward Danny. A few of the volunteers had to yell so they would stop fighting and we took Danny back to his kennel. This group of three happened to bring out the dominant side of Danny. I think most dogs who get along with other dogs won't have a problem in a group of three but you sometimes have to be careful in these instances.

You know, I just realized.. what if that's the same thing that happened when I brought Reece home.. 3 animals and Harley got so dominant that it also released his chasing/nipping instinct Well, I actually did keep Reece at my sister's for three days once to see if Harley would behave around Shiloh again but that didn't work so maybe not..