[ Herbie and his new buddy. So far, they are not BFFs. Yet. ]As Gregory put it succinctly, "Pets are just better in pairs." I agree, which is why, three years later, Herbie now has a sister. He hasn't quite warmed up to her yet (he peed on her during their introduction), but it's only been a day. Anyone have any tips for making the transition from one to two as smooth as possible?