I treated my 2 dogs with Sergeants pretect flee control in a squeeze on tube.Within 4 hours of treating my dog who DID not have flees at the time it was purley a preventative measure, she began to chew at one of her paws which quickly progressed to chewing all four.Shortly after that she began shaking uncontrollably at her back end and her eyes were fluttering repeatedly at which point she began collapsing all over the place she would get up walk a around in a circle falling over and in to things.Finally she became confused and went of to... read full review »