Hi there, I am worried about my cousins Russian tortoise. We have had this one for a year or so now and it does not get the attention it needs, but it well fed. It had white around its shell and plates. Is this new growth for him? Is this lack of vitamin D or calcium? She’ll rot? We don’t know much about tortoises and no one in the area does either. Can anyone assure me he’s okay. Thank you!