I only have 2 pups, but I hope to one day add a third.
Both of mine are female (spayed) and we really have not had any fighting issues with them. We rescued Lane from a puppymill bust just before Christmas 2008. She is estimated to be around 2 (6+ months older than Rory), but they do seem to have the same activity level which I am sure helps. Lane really looked up to Rory, much like I think a puppy would since her life experiences were so limited. Good luck!
