hello I have had a dog for a month now and he is so timid but he isn't aggressive in any way. I just know he is scared. He allows me to walk him, lay with him, lay with my kids, and he listens to the word no. but he barks and growls at my boyfriend a...

I just got a dog like a month ago and he is really timid and is scared of everything how do I start training him. I have to get him while laying down to put him on the leash to take him outside and he runs from me when I try to give him a treat. But ...