There is also another product that does both heartworm, fleas, and intestinal parasites. Advantage Multi here is a link
http://www.advantage-multi.com/
This product does not control ticks so it would not be a good option if your dog is at risk for tick exposure. If you do not have a flea problem than exposure to tapeworm is minimal.
http://www.advantage-multi.com/
This product does not control ticks so it would not be a good option if your dog is at risk for tick exposure. If you do not have a flea problem than exposure to tapeworm is minimal.