Wolf
Wolves live in familiar groups. The group is led by a alpha male and an female, they are the only reproducers. The other members are in general older hatches, but they also can be unrelated wolves to the family. When the alpha female goes to have younglings she digs a burrow and remains in it per weeks. The younglings born and live their first weeks, when they're more fragil, inside it. The mother does not allow that nobody enters, not even the alpha wolf, unless it is for bring her food. When the younglings are strongs the sufficient, they are taken for are of the burrow and presented to the other members of the group. All the members take care of the minors. The group goes patrolling the territory, hunting and taking care of the younglings. The wolves that arrive of one hunted divide pieces of meat for the young. 

Wolves, in contrast of the cats, do not depend on speed neighter on the surprise element to catch the preys. When they arrive in a herd of bisons, they clearly show that they are there and they wait the disbandment. They strategy is based on the resistance and the hunts can last days. The wolves teeth are ideal to hold the prey, different of teeth of cats, that they are ideal to dilacerate. Because of these strategies, the wolves are much more efficient in the hunted, being more successful than cats in general. However, the wolves do not cause no carnage enter the populations of great herbíves, most of the time they hunt old animals, wounded, sick animals or vulnerable younglings. So, altough the missing younglings, they make the herd most healthful. When the wolves grow they can choose to leave the group to form their own family.