My "farm" is doing well, too. My biggest difficulty is changing the substrate. I had one tub with a lively and productive setup. There was "frass" on the bottom so I knew I needed to put in new substrate. I haven't found a way to sift out the stuff I don't want without losing some of the tiny new worms. To solve this, I took off the top layer of everything, leaving mostly the frass in the bottom. I put the "good stuff" into a new tub and the plan was to throw that out the remaining but as I looked more closely, I could see it "rolling" like it does when there are little worms. So, I put some new substrate into that tub. Now about two weeks later, I have another colony. Does anyone have a method to separate these things? The idea of the shoe box size of a box sounds good so that you could just give the whole thing to the birds but then, I'd probably have to have too many boxes. If anyone has a plan to keep the good but get rid of the old without losing too many worms, I'm all ears.