I have a fila mastiff and started having problems with her
front legs. They bowed out and she was in pain. The vet
said it was from growing too fast. We gave her 10 days
of Rimadyl, switched her food to adult food from puppy,
cut down on her food and limited her exercise. She was
NOT allowed to run or jump for months. It causes stress
on the bones and joints. She recovered nicely and we have
no problems now. Her legs straightened and the pain was
resolved. I would definantley limit the exercise. Good luck.