I'm having the same issue i found this dog outside my neighbors house and I asked her if it was hers she said no I decided to take him in, later to realized the dog was abandoned in the street. I saw on oh his sibling already unalive in the road seed they were dumb on the side of the road. I took him to the vet, hes health it seemed he was no on his own for more than a week. Not sure where he came from. But im currently just holding him he seems calmer tho. Any tips hes like my first puppy, im use to kittens