Hunting dogs such as the popular breed retriever are ideally suited for retrieving birds or small game. However, the weight the dogs carry strains their locomotor system. A motion study has shown that the dogs tilt forwards like a seesaw when they carry the prey in their mouths. This can make already existing joint and tendon damage worse. Therefore, adjusted weights should be used for the training of puppies and adult dogs. Furthermore, the joints should be checked regularly by specialists.