Heartworm is a very serious and fatal disease that is caused by a parasitic worm known as Dirofilaria Immitis. Such a disease is spread from one infected animal to another via a single bite of a mosquito. And since this particular disease is extremely hard to cure, it becomes essential for pet parents to take necessary preventative steps. Thus, putting your buddy on a heartworm preventative schedule is mandatory. But unfortunately, there are quite a…