2 thoughts on “Hartz UltraGuard Plus burns dog’s skin”

  1. I had the same experience, but with another flea liquid. The burn went deep, became infected and was difficult to cure. More concerning, the vet. knew nothing about this complication of flea drops, but as a physician I was able to demonstrate a cause and effect relationship between putting the drops right between the shoulder blades and 3-4 days later the skin lesion occurred right at that spot and no where else

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