Just asking out of curiosity. I’ve always preferred mixed breed dogs because they seem healthier and hardier generally speaking.
Rusty came from the pound. The Aussie in him is obvious, but he is stockier and his head is heavier than most purebred Aussies I’ve met. We honestly don’t know what else is in him.
For most purposes, I prefer mutts. I have a purebred Border Collie, but there really is no need for a purebred unless you have a specific task that a dog needs to be bred for, and I don’t own any sheep or cattle.
I like herding dogs, but the AKC has been butting in on their breeding lines. I adored the Australian Shepherds I knew from the 70s, but the breed is now mostly marketed to dog sports. I hope the Border Collie doesn’t go the same route...
Oh, and the best dog I’ve ever owned had a Border Collie for a mother, but she got loose and, as the farmer put it, “wasn’t too picky”. I’d guess Chris had German Shepherd in him, and maybe some Lab, but what a great dog he was!