When hunting deer, pack members frequently all participate in the locating and stalking of prey. After that, anywhere from one to all of the wolves will engage in the chase. Larger prey animals, such as moose, caribou, and elk, don't always run when they encounter a pack of wolves. If the prey animal stands its ground, the wolves will often approach cautiously or abandon their pursuit after a few moments. When a prey animal does flee, the pack of wolves will chase them.
Most healthy ungulates are fast enough to outrun a pack of wolves.
In fact, fewer than one out of ten attempts to chase moose actually end in a successful kill. If they start to fall behind, the pack will usually give up the chase. If the chosen prey is injured, weakened, or old, however, the wolves can usually catch up with them and attack. This practice is simply too dangerous for the wolf, because to bite the leg, the wolves risk getting kicked in the face by the animal's sharp hooves. Wolves tend to concentrate on the neck, shoulders, and sides instead.