Domestication

Big cats chase down and strangle their prey which die quickly. Nature's dirty little secret is that with other animals this is not always the case. Animals like wolves just don't have the tools necessary to kill large prey before they eat them. So they don't. They just start eating. This is called "kill by consumption" and the victim can take days to die.

Undomesticated animals cannot be tamed. Never turn your back on an undomesticated animal.

Animals, like birds and mammals, that bear young that are incapable of fending for themselves have evolved to feel empathy for their young. The young themselves have, in turn, evolved to become cute and harmless so that the mother will care even more for them. But they lose that cuteness and harmlessness when they reach puberty. Domesticating animals is a matter of breeding animals so that they retain that cuteness into adulthood. See.

From Self-domestication

Gregory Stock, director of the UCLA School of Medicine's Program of Medicine, Technology and Society, describes human self-domestication as a process which "... mirrors our domestication [of animals] ... we have transformed ourselves through a similar process of self-selection."