I don’t thing there is any difference between shelter or foster home. In both cases the dog come to a new home, new people and environment. Usually they are scared a little at the beginning, wouldn’t you? I just adopted my second dog from a shelter. The first day he was very scared. the second day his tail was up and he was following me. the third day he wag his tail and enjoyed walking outside with me and the other dog. The shelter people told me that his owner brought him because of his endless barking and his tendency to escape. Well, i think he’s mute. We did not hear his voice yet. He is a small/medium dog that was left outside. He tried the sofa and twice i had to tell him NO. That’s it. We showing him tons of love, talking to him and encouraging when he is doing god. We do not crate. But we did use baby fence when we are out so he can’t roam the whole house. We did it for his safety and because of our other dog and cats. When we’ll be sure they are all ok together we’ll remove the fence.
The time it takes is different from dog to dog. It dependence on personality, on previous habits, previous experience, and how much patience and love you have to give him.
The guy in the picture is the new addition.
I hope it helps
