My five year old male blue turkey seems to get leg cramp in his left leg when he stands up. He whirls around in a circle, and it seems to me that his left leg won't support him, or is very sore. It takes less than a minute, and then he seems fine. Is this a deficiency in his diet? I am very puzzled, he free-ranges and surely gets a lot of nutrients from the different herbs/seeds he eats. He also gets bread, fruit and mixed grain. Any help would be appreciated, I hate to see my boy whirling so helplessly.