Should we have a cat or a dog? What breed will be best for us and our lifestyle Merle occurs in the Great Dane, Shetland Sheepdog, Collie, Australian Shepherd, Border Collie and Catahoula breeds. Hearing and/or vision defects are more common in Six puppies are a mix of beagle, pug and Catahoula Leopard dog. Three are Australian Shepherd mix and six are Labrador Retriever mix. Another two orphaned puppies, their breed unknown, will arrive from Memphis, Tenn., this weekend, Reed said. Anyone .