Some heating methods may cause temperature fluctuations that can cause your Leopard gecko to become too hot or too cold. Always be sure to cover heat rocks with a layer or slate or sand to prevent the gecko from lying directly on it and possibly burning itself. There are 15 diffrent illnesses known to affect Leopard Geckos, the main one being sand-impaction. Many leopard geckos have been found with large amounts of sand in them so if you are keeping sand in your cage be careful. If it drops its tail in a cage with sand take it out right away.
Leopard geckos lose all of their food and some water supply when they lose their tails.
Live shots of Jasper. Catch him while he's out.