Make sure the parents are not both Blu Merles. That is a no no in breeding Aussies. Also make sure your pup has a dark colored nose. Sometimes they have the pink nose & that can get sunburned & sore. A solid colored black or brown nose is best. The eyes should be even in size & the pupils dilate like they should. Also make sure your pup has good bone substance, that is thickness of the bones especially in the front& hind legs. Check the paws for any deformities. My Australian Shepherd is a standard size. He came from two blu merle parents. At the time I didn't realize that was a no no. He had one eye that was smaller then the other, a pink nose, & I later found a deformed claw on his hind foot. I went back to the stupid back yard breeder & told her not to breed the two parents ever again & she went & allowed the dogs to breed again. This breed of dog is so sweet, willing to please, loyal, & very athletic. My shepherd was a pet pal & visited care facilities. The residents would throw a tennis ball & he would catch it & gently drop it back into their cupped hands. They are wonderful family pets but need a lot of exercise too. Best of luck to you in finding your pup.