"If I could only reach that one spot!" Photo: doug88888/Flickr
Spot-on flea and tick treatments are liquid pesticides typically applied to the skin between the animal's shoulder blades or along the back. Some of those products, like Advantage, are sold only through licensed vets. Others, like Frontline and Hartz, are available in retail stores. But don't let that difference fool you. Spot-ons from vets and from pet shops can contain the same chemicals, and they're subject to exactly the same regulations by the EPA. "EPA is looking at all the spot-on products, regardless of formulation, regardless of manufacturer," said Kemery.
Spokespersons for both Bayer Animal Health (which makes Advantage and Advantix products) and Hartz said they haven't seen a rise in adverse effects from their products. They and other manufacturers of spot-on products are working closely with the EPA to get to the bottom of the story, Bob Walker, spokesman for Bayer Animal Health, told us.
The news of the EPA analysis has left many pet owners feeling confused and frightened. But is the problem as scary as it sounds? Steven Hansen, senior vice president of the Animal Health Services at the ASPCA, told us he's skeptical that adverse reactions to spot-on products have increased so dramatically. He points out that the spike in reported problems came just after the widely publicized pet-food recall of 2007. "The pet-food recall raised awareness for reporting issues with animals to a level we haven't ever been anywhere near," he said. "I really wonder if there's not just a much greater awareness and a greater reporting."

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