We have three dogs, Lexie, a border collie/akita mix (also known as flash coming thru the doggie door), Nellie, a rat terrier (Ms. Plus Size), and now Buddy, a boston terrier who we are fostering (but looks like he may be permanent)(also known as little flash following Lexie thru the doggie door.) Since both of my daughters have two dogs apiece, we occassionally have a herd to babysit. But we have an one acre fenced backyard it doen't get crowded until bed time.