How old is your bearded dragon?If he's young sometimes they will love their salad for a few weeks and then suddenly decide to just want bugs for a bit which is fine for younger ones but with adults its not as good if they just want bugs 24/7. My juvenile is usually good with her salad and bugs but she has her moments when she just wants her yummy crickets and calciworms and roaches rather than her healthy nice greens.
By spring mix do you mean a mix of stuff thats already in a bag? If so can you tell me what is in there just in case your feeding something you shouldnt.
Also it doesnt matter to much but can you tell me about his setup,
What is his substrate/bedding?
How big is his tank?
What uvb lights are you using? (tube light, MVB, coil/compact)
If a tube light is it a t5 10.0, t5 5.0, or a t8 10.0?
If t5 10.0 is it a HO?
Is the
uvb light inside or outside the tank?
What is his basking spot temp?
Any other heat sources other than a basking light?
Also what bugs are you feeding, how many times a day are you feeding him and how much each feeding.