No, I don't freeze them and then feed them. I suppose you could for an animal that would eat anything pre-killed. Just happens that my dragons won't eat anything that doesn't move. I just freeze them before I throw them out so that I don't have them running around!
If the male population becomes to large the males escape looking for females. Thanksgiving 2005 with a house full of guests, my in-laws, step-kids, and all, this happened. Here we had these great big, beautiful 3" cockroaches appearing all over the house! It was bad enough when hubby went to put his shoe on and felt a large lump that turned out to be one, but the final straw for my dear hubby was when he woke in the middle of the night with one crawling across his face! I have been careful to control the male population ever since, otherwise I wouldn't have roaches at all! 
Actually the adults are too large for my MHDs. They will only eat the nymphs at about 1/2-3/4". I love these roaches for the small 1/4" babies which are excellant feeders for my hatchlings which will eat me out of house and home.
So, you are going to get some MHDs? What kind? I have been breeding these for over 8 years now and just love them. I have just raised my first batch of coronata and have my first clutch of armata eggs in the incubator. The coronata will be some great breeders and I have already picked mine out! For me this is really exciting!
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Marcia - FroggieB Dragons
www.froggieb.com/MHDHome.html