Sorry this is so long, but I could not make it shorter and explain, there seems to be much confusion over some facts of nutritional contents and what they really mean. I am still leaving out lots of things so if anyone wants more detail and study info, contact me off list Its more complex than just a listing of fats, and saying oh this one has this much, so its bad. You also have to note the difference between the % of something in content and the % of grams in weight/volume. I have spent a lot of time with a nutritionist and zoologist to try and understand nutritional values of feeders insects. The ranges are so varied and so many factors can make the same food good for one age and bad for another. For starters there are different types of fats and how the body handles those. Beardies we all know can not process most fats well, this is unique to them, where a chameleon or monitor can handle and process them better. They store in a beardie and will haunt them later on in the form of fatty liver disease ) iguanas are also noted for this same storage/breakdown issue. So this is something that is very important for bearded dragons and should be a main factor in finding which insects are better feeders for them. Some studies from years ago, did indicate that silkworms have higher % fat contents in overall content and this was misunderstood in nutrition they provided. But for use as a feeder, you have to look at the types of fats, how the animal process those fats and the % of calories from those fats opposed to the % of calories from proteins.. No food is good fed in excess or as a sole diet. Variety is very important to balance and to avail the dragon of a wider range of nutrients and trace elements, but avoiding the poor items such as spinach. This will probably shock some people, but as more studies are done we are learning more, our views or understanding of how food contents interact increase and we have to change our thinking. These are not from my studies, but others that I used to do my own study on feeder contents utilized by bearded dragons (what a beardie can eat and use in their body is different from what say a chameleon can) Remember when I say something like mealworms will impact a 2 month old dragons, that does not mean it will impact a hatchling gecko that is 1/2 the size. There are digestive differences that come into play between the two species and make it so the gecko that is 1/2 the size can actually digest something better than a larger beardie. Its physical and has nothing to do with the size difference of the two. Baby dragons have a short digestive tract and paper thin lining in the intestinal walls. They simple can not handle the amount of chitin, especially if other husbandry lacks anything, such as proper temps or poor substrate they may ingest. In assessing all the current insects feeders, silkworms have the lowest % of calories from fats of any of them, the highest % of calories from protein. Looking at waxworms they have almost 4 times the % of calories from fats as silkworms... huge difference. It's not just the overall nutritional contents that is important, it's the types (fats or proteins) and % of calories from them Silkworms are an ideal feeder insect for not only growing babies (due to the % of fats from protein), but also otherwise healthy animals and specifically they are the BEST feeder for recovering, injured, sick or older bearded dragons due to the enzyme serapeptase in them. I know this as I spent the past 2 years studying this and the effect of this enzyme on a severely injured bearded dragon and have related this enzyme to beneficial effects on them due to the serapeptase. No animal can last long without negative side effects on steroids or antiflammatories and we were looking for a more natural food source to help him and not due damaging side effects, but still give him good nutrition and pain relief. Silkworms with the enzyme serapeptase is a natural anti-flammatory and pain reliever, better than many drugs available and without the poor side effects of some. This is beside the point on the question if silkworm are too high in fat, but wanted to explain how I know what the content and interaction facts are and why I was seeking the answers. Some other interesting facts about feeders from the studies: 2 week old crickets have a higher calorie content from protein than 5 week old crickets or adults. So another good reason to make sure babies are not eating crickets too large for them or to keep them on the smaller size. Yet its adult mealworms that have a higher % of calories from protein then the young mealworms or 1/2 grown ones. Again, another good reason to avoid mealworms, even small one for young dragons, the calories are higher in fats Just looking at calories processed from fats here is how they fall: waxworms are the highest, the next closest are tied between superworms and giant mealworms, then close (very close) come young mealworms, next is adult crickets, then adult mealworms, then young crickets and last is silkworms Now, on top of this above, you have to consider not only the fats from calories as mentioned above, but how other things in food, interact with that fat absorption. I will try to explains this briefly so it is easy to understand. EXAMPLE: Most know high oxalate foods can bind with Calcium and even if the animal is eating high calcium food, they are not getting much if any calcium since the oxalates are binding it and the animal can not absorb it (this is why you should avoid Spinach as a green for lizards). The same thing happens with fats in superworms and mealworms due to the chitin in them. The chitin binds with the fats and blocks the absorption of some of the fats. So even if the reptile is eating a higher fat food, they may actually be taking in and using less fat than a lower fat content food. Does that come across clear? It's not just what is in something that is valuable or harming, but how all the other things interact with them in the digestive process. Also, that digestive process can shange some betwwen the ages of the feeders and also the season they are eaten in. There are also other things to take into consideration in nutritional content and I have in the below list, but it would take pages to explain them all Due to the above and all other food content interactions, silkworms are a good food source due to lower % of digestible fats and enzyme found only in them. Superworms are a good food source (if the beardie is old enough) due to the meat to chitin ratio (better to avoid impaction) and the chitin actually blocks fat absorbtion. Mealworms are an okay feeder for the reason of chitin blocking fats (still not as good a food as supers if they are old enough) but should never be fed to baby dragons. Crickets are great for all the reasons including iron content that the others are low in and no bad ones. most important is that very young drickets have very high calories from proteins. Wax worms are the worst thing you can give them..due to all the bad reasons of little nutrition, loads of bad unprocessable fats and little protein calories... truly a junk and harming food * REMEMBER that some feeders should NOT be used due to animals too young or unable to digest them, such as the super and mealworms.These SHOULD NEVER be given to very young bearded dragons who have not reached the development stage where the digestive tract has lengthened from a hatchling stage. Also remember, greens are very important for all beardies and a better food source for mature bearded dragons than a heavy diet of insects.