Dangers of Flea, Tick, and Heartworm Preventative Medications

Fleas and ticks are a considerable nuisance, primarily if you reside in an area where they are prevalent. Pharmaceutical companies have developed and manufactured multiple products to combat flea and tick infestation, but at what cost to your dog? The active ingredients in the medications are neurotoxins that supposedly only negatively impact the offending pests. But how can that neurotoxin not have adverse side effects on your dog?