Mabel hasn't been too keen to play much lately and so we took her to the vets because she was finding it difficult to get into the car. We found out that she has an enlarged heart and also her hips and knees are out of alignment slightly. Poor thing she is only 3 well 4 in September. Now we have her on heart tablets and Metacam which along with healing seems to have eased her problems. thank goodness. Apparantely this is quite common in Bull Mastiffs. Anyone who has a Bull Mastiff and has experienced this problem I would be pleased to hear from you.