The image in this post is of a bearded dragon’s feces sample that is being examined under a microscope. The objects that are in focus are not normal. They are crystals that are formed when salt and sugar are precipitated out of the feces sample due to a lack of water, and are an indicator of dehydration.
A second noticeable issue that arises from dehydration is the occurrence of stones in the urine. Urine is the body’s way of getting rid of harmful nitrogenous waste that is a normal byproduct of the body’s everyday functions. Normally, it has quite a lot of water in it, as that dissolves the nitrogenous material and safely carries it out of the body. Reptiles that are dehydrated, however, can’t spare the extra water to produce normal urine. The body keeps as much water as possible, and as a result solid material precipitates out of the urine and forms small stones.
Sometimes, in severe cases, the stones can become large enough to actually block the opening of the cloaca, which is the point at which all waste leaves the bodies of reptiles. This can lead to many other problems.
Reptile hydration is extremely important, and can often be neglected by well-meaning pet owners. It is a good idea to soak your reptiles in warm water baths regularly to help them remain healthy.