I think another member (frenchy?) said that a cap of apple cider vinegar in the drinking water helps keep buggies away ? 
Edit: Here is the thread I was talking about but it was for mosqitos , I think it would be ok for Black Flies though http://www.pets.ca/forum/showthread....+cider+vinegar
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MK Furbabies 
Noel- 4 year old black and white cat
Felix- 6 year old black cat
Maggie-3 year old Newfoundland Dog
Sparkie- Puppy Shih zu
Last edited by MommaKat; May 5th, 2009 at 12:09 PM.
Reason: to add the thread
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