Mia pretty much hates all breeds equally but terriers and especially schnauzers set her off. We've had repeated bad schnauzer experiences. And she is horrible to my trainer's Belgian. Horrible. She also will bully small timid dogs like my friend's shih tzu mix. Summer likes dogs but is scared of big in your face ones. She becomes friends after a first warning from her Mine both get along best with very mellow big dogs or smaller dogs that are similar to them. As long as the dog can give them personal space they'll usually coexist well. Mia really get on best with very even tempered dogs.