I generally don't like to feed my plants. I like to let them catch there own food, but my Nepenthes don't catch that much. So I catch Japanese Beetles and feed them to my neps. To catch them I go out around 70 and knock them off the garden plants.(you have to do it in the morning when there slugish) I then transfer them into a pasta sauce jar with a cotton ball soaked in cleaning alchol in it. Leave them in it for 2 hours. They should be now dead.
Now , because some of my plants have smaller pitchers I pop off there small heads and legs and feed those body parts to the plants. For plants with larger pitchers I chop the bugs in half and feed them to the plant like that.(no matter how big the pitchers are you should chopp the bugs in half ,they digest better like that. If I don't use the dead bugs I put them in my compost pile. Any one else do strange things like this.
BTW, I don't do this juust to feed my plants. Japanese beetles can destroy a garden if not kept in check.