These guys were great...I had a Colombian that refused rats she would eat mice but not rats...and she's 5.5 feet long! It was ridiculous. Then I ran across a breeder of soft furs, I fed her one soft fur and after that she goes for every single rat. And now, she's all muscle, you can't get her off without several other people cause she holds one so tight. My Dumeril's isn't sure what to think though, he stared down a soft fur for half an hour before eating it.