Herman is about 7 months old now, and up till a few weeks ago he was a roach eating machine, but now it seems he really only eats maybe 10ish a day total. He used to eat close to 100 a day, up till about 2 weeks ago. I can't figure it out, I got him a new repti-sun his temps are great... we put him in a new tank not to long ago, maybe it has something to do with that, some times I think it is a little to big for him.
My second question is, I ordered some roaches from a supplier I found on this website, and ever since there have been little tiny bugs in the bottom of the bin. I am just curious if they are harmful/what they are?
He might be slowing down and entering brumation. But the switching tanks could be the problem. If it was the tank, the problem should go away in a week or less.
The small insects that came with your dubias I would assume are cleaner insects. Sometimes they are with the colonys. All they do is eat the poo and stuff they shouldn't harm your dubias, but I wouldn't feed them to your dragon.
Could you get a picture of these insects? It would make it easier to identify.