After losing Hazel to a respiratory infection (sure miss seeing her run after the others flapping those big yellow wings), I'm suddenly worried about the rest of the girls and started doing more reading on worms. I want to stay as natural as possible but also want to treat as necessary, if necessary. That being said, does anyone know if there are fewer worms in dry climates - high desert - than in more humid areas? In So. Cal our dogs and cats always had fleas but when we moved to SW Idaho, they disappeared and I was told it is too dry for them (unfortunately not so with the mosquitoes). Any thoughts? Thanks!