Researchers at the Messerli Research Institute hypothesized that domestication of dogs did not cause the tolerance or attentiveness of dogs now, but the attentiveness, tolerance, and cooperation of wolves with their pack mates. They believed that dogs and wolves are the same socially, but the difference is that dogs are more easily accepting of humans as partners and they lose their fear sooner. The researchers conducted many tests to determine if wolves showed cooperation with humans. The wolves followed a humans gaze like a dog. Dogs and wolves both used information from humans to find hidden food. When wolves and dogs were allowed to observe a person open a container with hidden food, wolves were better at imitating the person and retrieving the food. Thus this research showed that wolves may not be less social then dogs as previously believed.