The Aussie-Flat is not a purebred dog. It is a cross between the Australian Shepherd and the Flat-Coated Retriever. The best way to determine the temperament of a mixed breed is to look up all breeds in the cross and know you can get any combination of any of the characteristics found in any of the breeds in the hybrid. Not all of these designer hybrid dogs being bred are 50% purebred to 50% purebred. It is very common for breeders to breed multi-generation crosses.
Harry is a brother of Hasty. He is a guide dog for the blind, too. Photo courtesy of Helena
These are Aussie-Flat puppies that will be trained to be guides for the blind. (Australian Shepherd / Flat-Coated Retriever hybrids) photo courtesy of Helena
Flat-Coated Retriever mother with her Aussie-Flat puppies— the puppies’ father is an Australian Shepherd."They are sweet puppies and future dogs for handicapped people. These crossers have very good hips." Photo courtesy of Helena