The Golden Cocker Retriever is not a purebred dog. It is a cross between the Golden Retriever and the Cocker Spaniel. 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 either breed. 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.
American Canine Hybrid Club = Golden Cocker Retriever
Designer Dogs Kennel Club = Golden Cocker Retriever
International Designer Canine Registry® = American Cocker Spaniel x Golden Retriever = Golden Cocker Retriever
International Designer Canine Registry® = English Cocker Spaniel x Golden Retriever = English Comfort Golden