We have those. The reptile place we go to recommended we get them to breed, but none yet. Wish they would hurry up, i HATE crickets. The other day i was folding laundry and there was one of the roaches on my couch, we have them in a 10 gallon tank and my son must have opened the cover and didn't but it back on right. I was frantically looking to make sure all other 6 were in there LOL.(they were all accounted for) Don't know when it got out but it didn't get very far. They are not so bad after you get use to them.Madagascar hissing cockroaches.