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post #1 of (permalink) Old 04-04-2014, 05:08 PM
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Gretchen's Avatar
Join Date: Jan 2011
Location: California's Central Coast
Posts: 3,324
Do you give your dog Heartworm preventative year round?

The last dose of Heartgard I gave Molly seemed to make her lethargic. I was concerned and found this is a common side effect but then found an article that states a monthly dose of this stuff is not necessary depending on where you live in the U.S. Looking at the maps at the bottom of this link it suggests I use heartworm preventatives June through Dec for our region in CA, and I wondered if anyone else stops the meds during the winter and non-mosquito months?

Unknown Facts about Dog Heartworms
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