Maybe 5 or 6 months? We're also not sure, but that seems to be about how old he is based on how many baby teeth he's lost. Visiting my parents made me want to get a second dog too xD Kai was so happy playing with their puppy that I think he'd like having a brother or a sister. The house I live in right now isn't big enough for more than one dog though, so I'd have to wait until we move somewhere with a larger lot