My pit bull loved my yorkies..she always wanted to play with them..but if my yorkies got mad my pit would take of running scared lol..my daughters mixed breed dog (comet..she is german shepherd husky and retriver mix) she thinks the yorkies are her babies..so if she thought nikita my pit was getting too rough she would run over there and take nikita to the ground..it got the where nikita would hide to play with the yorkies and if comet seen her all comet had to do was look at my pit and nikita would take off running..I"m not kidding..i live on 6 acres and nikita was across the creek with the yorkies..comet was about 3 acres away and all she did was stand up and look at nikita and nikita took off running lol..keep in mind nikita never hurt them and wouldn't heck she was scared of them if they got mad..but it didn't matter the yorkies are comets babies lol..
Any dog can be vicious little or big..I agree with snow wa..i wouldn't have any dog outside without a leash if you live in town..I also wanted to mention..i'd wouldn't take any of the pups out til they've had all of their shots. I don't know if you know this or not..but if one dog that had parvo that came into your yard and used the bathroom..your pup can get parvo..and parvo can live for years on your property. It wouldn't recommend taking any of them outside til they have had their shots that way you don't have to worry about them getting anything..
Ok..i'm done telling my cute story lol...hope my advice helps ya juanita...