I recently put together a silkworm breeding shelf with heat. I have seen a tremendous improvement in my silks. Out of 200 small worms I literally have not lost 5 worms!!! All the worms are growing so fast,I have many already in the breeding bin and several have turned into cocoon's. I had one big set back as I lost a huge batch of eggs!!! It seems that even though the silks must have a very low humidity the eggs must have a very high humidity and the young hatchlings also. Any way here are some pictures...