Hi, can I get some advice please. I have a approx one year old tortoise, had him for two weeks. I read on this forum they can get worms when it gets out of control internally. Im just wondering do I deworm him as a preventative measure even I havent seen any worms? I bought this (pictutes attached) and I wonder if its safe. If he does need it, when I use it on him will he pass the dead worms in his feaces? (I got a bad phobia of worms) Thank youu