Sure. I think the word "want" is the problem here. We don't know how they want something. But we can see how they react when threatened. And some worms have great survival tactics when attacked. Even detach some parts and escape with the rest of the body, or secrete defensive substances. They have survival instinct. I don't know how they really want it but they try to live as long as they can. My hens don't think too much about it. They must be just delicious. But I see how they from time to time leave some worms alone and eat others that are similar. I don't know why. Maybe hens know more than I think.