I was wondering if it was safe to feed my five month old Hermann's tortoise greens that just sprouted (about two inches)? A couple weeks ago I planted turnip greens, collard greens, and the broadleaf testudo mix that sprouted immediately and have been feeding tortoise the clippings. I keep reading about how bad oxalic acid is for torts and worry that the newly sprouted plants might contain too much oxalic acid. Thank you in advance.