Maybe, he is aware of some temperament issues with your pup or her lines that if pushed might cause her to become unstable. Maybe she was sold as a pet because she was not the correct temperament for a schutzhund or police dog. And the breeder is trying to strongly encourage you against going forward with protection sport with this particular dog.
Heidi Ho, Odie
Joy-Joy, Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.