My one year old sulcata tortoise has a pinkish line, kinda like a crack almost, but not really, running down the center of its shell on its belly and it has a few others that are running crosswise. Is this ok? We feed our Sulcata timothy hay, some dark leafy greens such as Pak choy, and some of the dry tortoise food occasionally. It also gets Reptivite 2-3 times a week. Is my turtle alright? Is it just growing or do I need to take it into the vet?