You can use search button and find many many threads and posts on the matter, there is no point of going into in depth discussion here, you are welcome though to carry on discussion in one these threads on nutritional value.
summary however - too high in fat and chitin. Silks contain triaminase, horns - thiaminase and too much water.

the question was - if that's ok to feed mossy frogs only crickets as that's all they are interested in eating.