1 pointI have never had Dubai Roches, but I know that they tend to want to avoid high protein and instead go for high sugar food elements. Apple, orange, watermelon lettuce and strawberry should be ideal food items for them. I don’t know if you are using organic foods, but if not, that may be a solution. Cockroaches are quite picky and if they can detect high amounts of pesticides on their food they will not be as egger to eat it. No idea how to stop cannibalization sadly.