
Originally Posted by
JeffreH
You don't need to cut the heads off, the idea of mealworms being able to eat through an animal's stomach is an old wives tale that probably originated from death by impaction.
The hard part of an insect's exoskeleton is a structural, complex polysaccharide that is very similar in cellulose in plants. Just like cellulose, it cannot be digested by most of the animal kingdom and only very specialized organisms can break it down (Fungi and certain bacteria have the capacity to metabolize the polymer). Because chitin cannot be digested, it can potentially act as a blockage in the digestive tract of a herp if fed in excess... this is called impaction, The risk of impaction varies from species to species and individual to individual and is generally associated with particulate substrate ingestion, but it can occur if too many hard bodied insects are fed in the diet (i.e. mealworms).
Not to be confusing, but it worth noting that ALL insects have chitin in their exoskeleton. The hardness is dictated by the relationship of the polymer with scleretin protein residues and other protein components interweaved within the cuticle. This is probably useless jargon to you, but wanted to point that this is why mealworms are more hazardous to feed than say, a silkworm or soldier fly larvae who are soft bodied. Scleretin is probably the true culprit of impactions because it makes the cuticle less flexible and therefore less easily transported through the animal's digestive syem...but I digress.
The controversy behind mealworms is their overall poor nutritional quality [see previous post] and poor meat to shell ratio...which can lead to impaction if fed in excess or exclusively. You can feed them from time to time, just don't go overboard. Think of them like a treat.
So yes - crickets are good feeders and see if you can get an earthworm culture going as they are very easy to breed. You can also supplement the diet with solider grubs (calci-worms/phoenix worms), silkworms, and roaches. Roaches are a great feeder overall and lack the annoyances of crickets because they don't smell, chirp, or jump. Limit waxworms, trevo worms, mealworms, and appropriate sized superworms (zophobas) to treats. As far as variety goes, you don't need to be feeding a different prey item every single day... focus on your staple quality insects for that but just supplement the diet from time to time with other feeders = )