Hello everyone, My daughter just got a Russian Tortoise & I've been trying to read up on a good diet for him & bedding, apparently the pet store doesn't know much, I've seen post about substrate bedding, can anyone explain more about what this is??? & I was comtemplating buying plants that he can eat, but I read you have to have them for months b/f you can feed it to them??? Where do you find greens in the meantime???? HELP please