I'm a fan of Jean M. Auel, the prolific author of the Earth's Children series that begins with the book Clan of the Cave Bear. The books follow the life of Ayla, who is separated from her parents and tribe as a child, is adopted by a Clan ( "the flat heads") that is not of her own people, and is eventually shunned by them for being so different.
Driven to survive on her own, she spends a winter surviving by holing up in a cave in a valley, only going out into the cold to hunt with a sling shot and surviving by foraging plants in summer weather. Eventually, she finds a wolf cub that is also alone to be a companion and through observation and training, turns him into a prehistoric pet wolf - dog who comes when she whistles, to the amazement of every person she encounters from then on. This then is Jean M. Auel's way of introducing the relationship that humans and dogs have had for thousands of years.
When all the breeding dogs into small and even incompetent animals began, who really knows? I once watched a video about what the world would be like if there were no humans. Dogs would quickly resume their traditional lives of hunting in packs, and most of the flat faced ones would be so bad at hunting that they probably wouldn't survive.
