Quote:
Originally Posted by theporkieyorkie  I test every year in the spring. I only give HW preventative during the spring/summer months.
I didn't know it was recommended year around now. I thought you could either give year around or test annually in the spring for it and then start giving it. |
If you are going to only do it during those months, you really need to speak with your vet.
Here are the guidelines from the Heartworm Society:
http://www.heartwormsociety.org/pdf/...Guidelines.pdf
From that site:
To be maximally effective, heartworm prophylaxis should be given year-round, but if seasonal treatment is chosen, administration should begin at least one month prior to the anticipated start of heartworm transmission and should continue for at least 3 months after transmission typically ceases. The latter 3-month recommendation emanates from new knowledge regarding resistant strains, which showed that extended treatment after exposure is required to
prevent infection. Current data demonstrate that not all compounds and formulations necessitate this extension.