I can understand the need for concern, but just because a dog is bigger, doesn't mean it's aggressive or will hurt another dog.
Mckenzie is actually the one who causes drama at the dog park because she barks non stop out of fear and gets the others going. A large sheepdog wandered over one day w/her very nice owner and it's been Mckenzie's best friend ever since there.
As long as a dog is leashed, listening to it's owner and not acting aggressive, I try to socialize my gang whenever possible w/dogs big or small. |