We adopted a 5 year old male from a local couple who had to move and couldn't keep their bully. We have had him a year with no irregular issues that most bullys have. But over the past few months he has become more and more aggressive to the point of attacking my female great dane and biting at me when I discipline him for jumping up on a chair to try and take food from the kids or trying to move him out of the way. I never am rough or mean or threatening. He reacts to my husband when he is playing with the kids or raises his voice by coming after him to bite him. We took him to the vet and a trainer. Trainer said he was fine for her. Vet says he has spinal stenosis. Put him on novox. He has gotten a little better but is still aggressive. I cant handle the stress this is causing in the family. I sure could use some advice as what I can do to help with the aggression and to relieve his pain. I have had many dogs and a bully for 14 years and never had this issue. Need advise please..