I leave my Sarracenias to do what they do best. The have been catching loads of flies and now wasps. Back in June I was dropping Narcissus flies in to the pitchers
I haven't seen anything going in to my S. purpureas so recently I've been putting in flies and more recently crickets. In June I was dropping in Narcissus flies
My Cephalotuis and Nepenthes have been getting woodlice
I've let my Drosera do their own catching. Some are doing better than others. The upright leaved species are catching more than the spoon shaped species. A week ago I put an over ripe banana beside them to attract fruit flies but despite 100s on the banana none have been caught.
Vine weevils are now out so I've found a good use for them
Normally I don't feed anything. The plants can manage just fine when grown in a greenhouse or outdoors. However, I started some Drosophyllum off a bit late in the season so they're getting freeze dried bloodworm to hopefully get some size into them before winter. I also gave the bigger ones some dried mealworm. I must admit they appear to appreciate it and it keeps me occupied for a few minutes If I have pests to dispose of eg. during Garden Chafer season then they do go to the plants. Those I give to the Dionaea and Heliamphora but it's only because I already have to dispose of them. Spare the poor woodlice and buy a pack of dried mealworms, you can throw the occasional one into a Nepenthes pitcher.
Be very careful of feeding with liquid fertiliser, even well diluted, as overfeeding and/or contamination, can very quickly cause problems. Not feeding at all will not create any