Our dog Reese Cup was locked up in a car since he was one to two months old. We brought him home after his "owner" said we could keep him. That pup was raised to poo, pee and eat in that car with very little human interaction.
He is slowly learning how to go potty outside. Still barks and growls at all strangers. He just recently got use to our room mates' brother. We have had Reese for a month and so far he yips very loudly and wags his little tail and barks (or pees) excitedly when any of us come home.
His previous owner we believe also beat him up or mistreated him more than just keeping him in the car all the time. I wish there was more proof for animal abuse to arrest that guy.
Thank you for taking the time to read this.