Of all the parasitic infestations a dog may face, heartworm is among the scariest for both pet and owner. A single bite from an infected mosquito can deposit immature heartworm larvae into a dog’s ...

Dear Dr. Johns, We are considering having heartworm treatment for our doggy. He is the last of at the most five dogs and three cats we have had over a period of 40 years! We are old and disabled now.

Somehow I let Valentine’s Day pass without talking about heartworms! This was a big lapse on my part that I will try to make up for now. Those of you who are less veterinary-inclined probably don’t ...