We have been told and read that they are not as prolific as say, death's heads but I really like raising them as a feeder roach. The adults, as I said, are crunchy, but the nymphs suit just about everybody in our collection. They have really neat behaviors - one dominant male will fight with the others to maintain dominance, etc... Also, they look extremely un-roach like (we like this) and are fun to bring to class (I have some in my classroom) and give to friends - well, ok, friends that like bugs. They like it warm, dark, and ours do fine on just daily fruits and veggies with no supplementary water. They eat a high quality dog food. A band of vaseline keeps them in just fine, although they can climb. Good luck!