<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>When Opie was being treated for Heartworm, the vet had him take the monthly preventative as well. The preventative will kill the baby worms while the treatment kills the larger worms.</DIV>
<DIV>Hope this clears it up ....</DIV>
<DIV>Barb</DIV></td></tr></table>