I'm about to be dealing with this, and I need advice. I'm not going to have a lot of money. And several people have told me to stay away from chemicals (even though I've resorted to them before). Does holistic flea control work in TX? Is there a cheap flea control product that works? Something that also repels mosquitoes? Am I going to have to pump my dogs full of chemicals to prevent heartworm? A few people have suggested Ivermectin, but I've read a lot of horror stories about it being harmful to herding breeds. Opinions/suggestions please.