It is one box, 6 tubes in it. It is a 6 months supply.

Heartgard doesn't treat tapeworms. We recommend, Milbemax or Drontal if you have tapeworm problem.

Yes Nexgard kills all kind of deer tick.

Yes, we can certainly do that for you. Please place your order with 3 month auto delivery and contact to our support team. They will adjust your delivery period manually.

Yes, the both need to be given each month.