Does anyone on here culture black soldier flies for their birds? Are you using the "BioPod" or a homemade device? I'm interested, but that pod is REALLY expensive and I think I could make something myself if I could figure out exactly how it should work. How do you get the thing started--where do the flies come from? Do you have to buy flies to start it, or do they just show up? If they show up, how do you get the right kind of flies and not just house flies or other pesky ones I don't really want thousands of hanging around my yard? Does this thing only work part of the year--when it is warm enough? We don't really have flies of any kind that I notice during the winter.