I just purchase the new SC Johnson Off Clip-On mosquito repeller device last weekend.  Every time I used it when taking my Mini Dachshund outside, she would vomit within 8 hours.  I became suspicious and found the active ingrediant to be Metofluthrin. 

I searched the internet and found the EPA pesticide fact sheet for Metofluthrin.  In part, the data reads: "Metofluthrin, like other pyrethroids, is neurotoxic in rats, rabbits, and dogs; both sexes were equally sensitive to metofluthrin. Clinical signs include tremor (all species), vomiting (dog only), and increased salivation (rats and dogs). Clinical signs appeared within 206 hours post-dosing"  further, "Evidence of neurotoxicity exists throughout the entire toxicology database via the oral route of exposure in three species (rats, rabbits, and dogs) and via dermal and inhalation routes of exposure in rats."  also, "Increased incidence of tremor was observed in males at 30 mg/kg/day in the chronic dog study. Tremor was observed in the head, limbs, or body of all males beginning on Day 96 (1-5 incidences/dog except one male with 46 incidences) and in only one female and only on Day 289. Tremors were observed 2-6 hours post-dosing and disappeared by the time of observation the next morning."

This devise draws air through a Metofluthrin saturated membrane via an enclosed fan and discharges it downward to the ground when worn clipped to the belt as instructed.  Since my Dachshound is a miniture and stands close to the ground, I surmised the she was inhailing the same fumes ment for mosquitoes. 

 I am posting this as a warning to all dog owners, especially owners of breeds standing close to the ground.  I also have my doubts about it's safety for humans as well.