And they were all dosed June 21..four cats and two dogs. And worse, my grey Russian blue type, (she's from a feral colony) is allergic. Too early to dose again. I vacuum, and comb but what to do? This happens every summer for awhile, then disappears till the next summer. What about that lookalike med that's sold at Walmart which is supposed to have the same properties that frontline does? Any one try it? Name may be Armour something and available only at W-MART. I usually get stuff online form Canada but this batch was from Petsmart. .