If you are considering breeding your own Dubia colony, the thread below covers pretty much anything you could want to know about Dubia, their bins, multiple heating sources, what to feed and what not to feed and on and on. About half way through the thread I posted some good info I obtained from a professor that has been posting research papers on roaches since 1966, along with some links to his work that are interesting. One thing to note, people seem to think that you want to feed roaches more and more protein, but in fact that is not good. Too much protein will cause a build up of uric acid in the roaches and then when you feed them to the beardie, it increases their uric acid levels. There are over 4,800 species of roaches and all have not been researched, but most roaches can thrive on as little as 4% protein. Roaches are also selective eaters so if they have enough protein in their system and you give them options without much protein, they will self select the food that is best for them. So be sure to give them fruits and veggies enough so they can opt out of other foods if they need to. Either feed leftovers from dinner. Many people say Dubia breed better when you feed them oranges, but they will eat pretty much anything you put in. You can put in leftover watermelon and the next day the peel will be eaten down so thin you can probably see through it. Just be sure to remove fruit and veggies that remain every day or so. If you don't you can end up with mold which can destroy a colony. We had a box of baby spinach that we would have eaten the night before, but we had fresher and opted to eat that and the next day I gave the leftover spinach to the Dubia, which I'd done many times in the past. This time there must have been mold on the spinach. Some mold is perfectly harmless to Dubia, while others are deadly. Shortly after I put the spinach in (maybe 5-10 minutes) many of them started running around like they were on speed/uppers and would not stop, and a short time later they started having diarrhea, at which point I realized what was happening and removed all the spinach I could, but I still lost about 1/3 of my colony.
If your colony starts to breed too quickly, just turn off the heat and it will slow down their reproduction and growth rates.
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