My fermented feed bucket seems to attract lots of fruit flies. I use the single 5 gallon bucket method (no draining, just mixing in new feed/rainwater as needed) and have fruit fly larvae (not piles of them, but I can see them) on top of the feed and some on the sides of the bucket. BSF and my mealworm bins have done a good job desensitizing me to larva. Seems like these should just be a free extra boost of protein in their feed. Am I wrong?