I really want to stand behind the person who says to make the animal happy and not what works for you. You're doing your research and that's great! I hate to disagree with people here who are right, but the Maxwell book is 55 bucks. Go to Signalherp.com and order his 10 dollar book. Rico has been doing this for a very long time, his book is short and sweet. If you get a book and decide that chondro's aren't for you don't be out a lot of money.