Due to their size we haven't allowed big dogs around Caleb (Pippi is too young, and hasn't had all her injections yet, so it's a no no) If we had good friends or family with large dogs, maybe we'd do an intro, and supervise, but we don't.
We have a large border collie ourselves, we supervise their play and interaction. Ishmael (Border collie) is SO clumsy, the clumsiest dog we've ever had. He's friendly but could hurt the smaller dogs, occidentally or thoughtlessly. When he sees a ball, he thinks of nothing else some times. If Ishmael is lying down, we let the smaller dogs go over to him, or if he's outside, he'll play with Caleb.
That pic is so cute.
__________________ Caleb   Pippi |