Some over the counter flea collars are very dangerous. I remember Hartz, in particular, has been known as a collar that has caused severe problems, even deaths, in some cats. Google for more info.
it's safer and more effective to use Advantage or Frontline for
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• Thanks, I'll let my daughter do the research. -CHAYA- ♀ (0 bytes) () 09/18/2010 postreply 18:53:22
• 我也正想说这个呢!非常同意! -tryonetry- ♀ (0 bytes) () 09/18/2010 postreply 23:07:33