There is reason to think that early Indo-Europeans had adolescent war-bands, bands identified with dogs or wolves. It seems likely that they were composed of boys about the same age , came from the wealthier families, wore animal skins, and were sent off into border areas, where they caused trouble. After a few years they rejoined regular society.
Passages in the Vedas suggest that there was a midwinter initiation ritual in which these JDs died and were reborn as dogs of war. There are lots of references to this sort of thing in Celtic, Germanic, and Indo-Aryan legend and mythology.
Dorcas Brown and David Anthony report on the excavation of an late Bronze Age settlement near Samara, Russia. They found evidence of a winter-season sacrifice of many (> 50) dogs and wolves – not usually eaten in these cultures. They were chopped into little, tiny pieces., especially the heads.
The animals were mostly over six years old and had been well treated: Brown and Anthony suggest that they were pets, and that the boys had to kill their own dogs as part of the initiation rite. That’s disgusting.