OMG Mary Jane was an obsessive drinker. She would stand there and drink water until you told her to shut up loll. About the legs, has he been injured before or is this a new thing? Mack walked all jacked up but it was because he snapped his leg and it was fused together. AB's can be very big dogs and can get hip dysplacia, like rotts or GSD's. I would take him in and have his back checked out. Please let me know if there's any other questions you have or if you need any help.