I adopted a dog from a shelter about a week ago and when I first brought him home he was okay with everyone, a little scared but got pretty used to them and would approach them within the first couple of days. But the past three days or so, whenever my brother would be around, my dog would go immediately growl, bark and even chase after him when he goes upstairs. He never does this with anyone else including strangers (and he's the type of dog who's wary and cautious around strangers) but for some reason seems to hate my brother. The only weird thing is that I fostered two dogs on two separate occasions before (both male like my current dog) and they both were okay with everyone else but my brother. I'm trying to figure out why it's only with him and not anyone else.
My dog has no issues with boys, he is completely calm and okay with my other brother and any other guy that we walk past. And I know his foster and the people he lived with before i adopted him and they were perfectly fine with the dog and did not traumatize him in any way. It's just my one brother that seems to be the problem with him.
Do you know dogs pick up something bad about a person and I'm thinking your brother might have a cruel streak in him, one that he hides from you but dogs can pick the scent up easily. I would'nt trust him so don't leave your lovely new pet alone with him. I also think that your dog has a 6th sense and this has been reconized in dogs. war dogs always knew when their owners had been shot down as they gave up waiting and dogs also sense Cancer in people. You have chosen a remarkable dog or did he choose you look after him well.