I can personally handle up to four. I enjoy having two performance dogs - three is at my limit and then a pet dog or two. I currently have three dogs (two performance, one dabbler that prefers to be a pet) and am also working Jason's Border Collie in performance. Jason has 4 dogs, with a 5th we just added as a foster. Since we work with dogs for a living now and are able to bring our dogs to work and train/exercise intermittently throughout the day, things are a lot more manageable than they otherwise may be. I never feel like I have too many dogs. I sometimes wonder if Jason enjoys having as many as he does but he seems to be happy and says he likes it. I am happy with my crew right now. I think once Eden is older, I will probably add another performance dog to get started but right now my dogs are young. There is a really lovely Koolie puppy that I would love - but not a good time