Sydoo Posted June 9, 2010 Share Posted June 9, 2010 Sigh. The vet had already gone ahead and ordered the heartworm chews for us. Turns out she ordered Heartgard and "each chewable contains 136 ug ivermectin" She's a very experienced vet ... perhaps it's all right given that Elbie's only 1/4 border collie ... I'll speak to her next time we go ion because he doesn't have to take the latest heartworm tablets until August. Until July he's on 1 tablet of Milbemax Dog a month. I just know she'll give me a really baleful: "You are stupid and annoying" look though ... From memory, I think the incidence of reactions in border collies is less than 5% whereas collies is 70% so maybe it's not too bad We have been using Interceptor Spectrum so far. Our vet said we could have a DNA test to check - maybe you could investigate that? No idea how much it would be. Link to comment Share on other sites More sharing options...
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