I think it's a bit hard to control a garden of carnivorous plants because they have a specific smell and can attract anything around them. One solution would be to sprinkle them with special preparations that would protect them from attacks by birds or insects. I think that would be an excellent way to solve the problem. However, these preparations may contain some chemicals, so I recommend using the best fertilizer for vegetable garden or any other green. It doesn't matter here. This way, you will be able to protect your plants and from the impacts of those preparations. I hope I helped you.