I have a 6 1/2 yr. old pug. I usually use Frontline, but I happened to be at the Acme and purchased this product because of convenience. Within 1 hr., he started salivating, scratching uncontrolably and bitting his own front paws and breathing louder than normal (and pugs are loud to begin with). The next morning, I called my vet who said I should administer .25mg of Benedryl. He got sleepy, but it didn’t help his itching. In the middle of the night, he started twitching as if he had no control, and was obviously extremely uncomfortable. I went to the ER where they gave him a shot of steroids and muscle relaxers and said he wouldn’t die since he didn’t go into a spasm or fit, but it would take days for this POISON to get out of his system. I went on-line and was horrified by what I read ! I’m now in the process of contacting every agency and news media I can muster!