We bought a dog 8 months ago where we have tried to train him.... he doesn't listen he still nips and snaps and it's now getting to the point where he is jumping up and going for my toddler and you can hear his jaw snap ! It's scaring me as I can't leave them in the room together he does it to me and my bf he tries to bite his ankles and he's the master so it's in heard of isn't it ? He knows not to go on the couch yet still runs in covered in mud and going on there he's not allowed up stairs but as soon as back is turned he's up there.... we've always told him no and made sure he knows and he does get praised when he's good (which is never ) he chews everything up in site and will just take food of the side and out of my boys hand, I'm currently pregnant and it's getting me so anxious ! He goes on walks everyday so he's excersised a lot. He doesn't listen to me whatso ever and when I play with him he gets aggressive to the point it scares me. Any advice would be helpful ? No nastiness please I'm at by whits end