What do you guys use. Teagan and pup, pup will be spending about 10 days in central BC. And heart worms are a slight concern, although not that intense in the Okanagan. I am not too worried about Teagan as she has thick fur, but pup, pup is smooth coated. I would really rather not load them with anything tropical or chemical so I am thinking loading them up with mosquito repellent when they go outside. I am looking for something as natural as possible.