I have one and she's fine. She's happy to see other dogs, but happy to leave too -- even when we're with other greys she often wanders around alone, or tries to play with the humans! Not all hounds are that confident, though; I gather there are many who are much happier with a hound companion. I find that sometimes GT can make me feel guilty about having only one, but as a single person without a real yard who travels a fair bit, I cannot realistically see accommodating multiple greys at present. I work really hard at giving my one hound a great, stimulating life with lots of new experiences and fun interactions with many people and dogs!