Dogs have a whole social thing going on when they meet that I don't understand. Fortunately my dog has a very submissive personality - she's still playful but no dog feels threatened by her so they will play along with her. I think she's part whippet so maybe whippets tend to get along well with other dogs.

Sadie's the perfect size and personality match for me- , if other dogs get too aggressive Sadie just jumps into my arms and we both look down at the "bullies".