My Mother occasionally looks after a Parsons Terrier named Bertie. When I first met him in November '09 Bertie was fine he played with me and was friendly as can be. It was in December '09 after I's had an operation on my knee, that he started to hate me. After my operation I'd developed a limp and couldn't walk properly, the dog became scared of me and would run away when I entered the room. As time has gone on the dog has got worse, he follows my mother around and will bark at me whenever he sees or smells me. He has shown me his teeth on numerous occasions and has to be physically restrained from attacking me. On one occasion he has actually bit me. He Is becoming increasingly bad and I have mo idea why?