In my experience, they are either calm or they are not. I got into jungles around 93 and out of the large group I had, only two were calm enough to handle without worry. It's actually the reason I began working more with chondros. I don't understand where chondros get a bad reputation when all the carpets I've ever had were much more difficult to work with as far as temperment. Give me a nasty chondro over a nasty carpet any day.