Should I give my dog heart worm preventative all year round?

Should I give my dog heart worm preventative all year round?

This depends on where you live. In order for the heartworm microfilariae (baby worms) to survive in the mosquito, temperatures have to be over 67F for 2 weeks. This could be most of the year in the south. In the north, not as much of the year. Heartworm disease is...

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