I have 2 Redfoots Bonnie & Clyde that are 2.5 years old. They have a good diet that consists of greens, fruit, and cat food and receive Multi vitamin, Calcium and D3. About 5 months ago Bonnie had a respiratory infection and it had to resolved with antibiotics. She is now better, however her shell is Pyramiding and has only become apparent recently. Clyde is fine and his shell is normal. What should I do? What is the cause of the pyramiding?