Protect your dog with Plus Chewables. These chewables offer effective protection against fleas, heartworms, and more. Ideal for dogs weighing 33.1-66 lbs. This is 13 months of Nexgard. Chewy price would be over $400. I bought a years worth and my pup died two weeks later. Only the 13th month box is open because I was supposed to give it to her the day after she died.