Cassie has now become worse on her lead. This morning took her around the street and it was a nightmare-no pleasure at all. She bit the lead and me every few steps and really appeared quite vicious. Unusual for her as she is a collie and very affectionate normally. Took her to the beach later and she was fab off the lead. Then my daughter has just took her out around the street and again she was a nightmare. My daughter came back with a bloody finger. Nothing seems to work. Am thinking it might be best not to allow her off the lead for a few days to see if this helps.