how old does a puppy have to be for tick
From the maker of FRONTLINEÂ® Flea & Tick. Productsâa brand you can trust. NexGard soft chew is FDA-approved, and proven safe and. effective for use in dogs and puppies 8 weeks of age or older, weighing 4 pounds or more. It contains an ingredient, afoxolaner, that kills both fleas and ticks.