– Insects: Bugs will bother your pets as much as they bother you. First and foremost, be sure your animals are on heartworm preventative. I also advise leaving your pet indoors in the early evening hours when mosquitoes seem to be at their worst. Fleas and ticks are also harmful to your pets, and your heartworm preventative will most likely cover them. Check with your veterinarian for his recommendations. Other insects like flies and bees present a problem, especially if your dog – like mine – likes to chase them and try to catch them in her mouth. I keep a fly-swatter handy to quickly put an end of flying insects in a hurry.