The only ever negative I have ever heard of with dubia roaches is that the high protein content can cause gout. Having said that I feed my leos 3 times and week and 2/3 of those nights its dubia. And I have never seen gout.
Looking to get into coleonyx and wondering if anyone can refer breeders/sellers that they have dealt with. I know of "back water reptiles" and "golden gate geckos" as of right now, but any other recommendations? I appreciate your responses in advance :)