I think forced socialization becomes the problem. When the handler becomes so obsessed with their puppy being buddies with all other canines. I think that puts too much stress on the puppy as well as the handler. Stress = breakdowns in social patterns.
Hondo Von Dopplet L Bauernhof "Hondo"- GSD
Lilie's Tug McGraw "Tug" - Golden Retriever
Maggie - Mini Dachshund (Rescue)
Lonestar Pivo - Texas Blue Lacy
Ashe - Barn Cat
Katie / APHA