the.com/pack leader

means The person in charge of a group — originally wolves, now mostly a title dog owners give themselves to justify dominance-based training methods.

from 'Pack leader' rides on 'pack,' from Middle English 'pak' (a bundle of things tied together), later extended to mean a group of animals hunting or traveling as one — wolves especially. The 'alpha wolf leading the pack' idea comes from mid-20th-century studies of captive, unrelated wolves thrown together in zoos, which produced artificial dominance fights. The researcher behind that work spent decades afterward trying to walk it back, pointing out that wild wolf packs are just families, led by parents, not a snarling alpha who fought his way to the top. The science moved on; the phrase, and the training philosophy built on it, did not.