Twins are rare. A newborn lamb weighs seven to 15 pounds. Before the lamb is even a day old, it can run-but not very fast. Soon, lambs begin to practice butting heads. In this game, one lamb gets on top of a boulder or little hill, and the others try to knock it off.
Bighorns live mostly in high mountain meadows.
They are sure-footed and can easily climb slippery rocks. This skill helps them escape from predators such as cougars, grizzlies, and wolves. Sometimes, however, an eagle or other predator kills a bighorn lamb. Like cows, they chew a cud. This means they chew the food, swallow it, then later bring it up to chew again.