I'm just seconding Pyro. I leave my plants outside 24/7. The only problem this has caused is that now the plants are bigger and will need more room in the fridge this winter for dormancy.
I don't think you can over feed a flytrap. Sure the trap dies after 3-5 meals, but the one that grows to replace it is usually bigger anyway.
Just my 2.

Have fun and enjoy your VFTs.