 On the one hand, it could be theorized that dogs have been selected, during domestication, for tame temperaments and an inclination to cooperate and therefore should outperform wolves on a cooperative pulling task.On the other hand, it could be argued that dogs have evolved to become less able to work jointly with other dogs because of their reliance on humans.Wolves rely on each other for hunting, raising young and defending their territory; dogs rarely rely on other dogs.