Bearded Dragon.... dead? dying? Why?

You need to place the beardy in luke warm water. Let it sit in the water untill it goes to the bathroom. What has happened is all the crickets have impacted the lizards bowels, the exoskeleton, or chitin, of the crickets has clogged up the lizards digestive system. When this occurs the lizard will appear lethargic and lifeless, and will eventually die if it can't expell it's waste. The warm water will help the lizard move it's system. Don't forget to feed the lizard other types of veges or fruits.