I have a very large fenced in yard, my pets love it! There is plenty of room for them to have fun, run around, and play. My puppies have been around many other dogs and weigh no more then 6 pounds. They love interacting and playing with all different types of dogs, so you have nothing to worry about! Also everyone in my household is vaccinated for those whom it may concern. My puppies are also up to date with all of their shots!