I would never take a chance with heart worm... I use NuHeart that is just for heart worm... small pill once a month... we do not have issues with heart worm in NoCal but I do not take a chance. I use it year round. In the area that there is frost/frozen for the winter you can use it just in the spring/summer/fall months.
For fleas/ticks I use frontline but only when I see fleas... again in NoCal not too much of an issue.. I need to use it maybe about twice a year and only when need or if I am traveling with the pups.
Heartworm
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Just a question though…
Do you have the injectable heartworm medication available in either USA or the Dominican Republic ???
We have it available here in Australia, its a yearly injection, marketed to those who are forgetful about the daily or monthly oral meds !!! It has had some bad press from quite a few people, who are having issues with it. Adverse reactions, and possible auto-immune issues, I think... I cant for the life of me think what they are though, (sorry mushed brain ATM !!!).
Just curious ???
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They had deaths from it here in the 6 mo version (the australian one is 12 mos, same drug!), pulled it off the market.
http://www.hc-sc.gc.ca/dhp-mps/vet/faq/proheart6_qa-qr-eng.php
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