With mealworms;

I am raising a group of dragons on mealworms alone, this is an experiment to determine growth and overall health.

Last week all my dragons stop feeding on the mealworms, they refused them and seem to prefer starving them mealworms. They also refused minimealworms witch they usually go crazy for.

At first I tot this could be boredom from a single food source, but after investigating I really think its about toxicity, perhaps from the peal of carrots witch may contain chemical residue?
If anyone experienced this before any comment would be appreciated.

Meanwhile Iv discarded the entire mealworm colony as these toxins I am told will remain in the bug its entire life cycle.

pleas let me know if this makes any sens?