I think you don't grasp the concept of mutt meaning unknown and get to caught up on it meaning a mix of breeds.A mutt could be a pure bred dog, you just don't know his lineage. And no, I don't like breed specific rescues. That's just my opinion. It's breedism. We had a dog that might have been a lab/new foundland and neither lab or Newfie rescues would touch him because he didn't look like a lab or a Newfie. That's just messed up. Judging a dog is worthy of getting help by a breed specific rescue based off what someone thinks the dog might be. Nothing about what's his behavior. Does he like to swim? Does he retrieve? Oh both breeds have those traits so you can decode Breed based off that alone. And What does it matter? It's a dog. People can rescue and help what they want that's on them. At least they are trying and I applause any rescue for that.
Multiple pure breed dogs don't always have the traits of their breed and multiple might. Most traits are not isolated an when you read descriptions they typically overlap. Who cares as long as each dog is managed responsibly?
Sent from Petguide.com App so please excuses the typos