Bests & Worsts Reviews from Amazon

Something has changed in the formula? I've been treating my six cats successfully with Advantage for at least the past ten years. Just last night it was time for their treatment again. This morning I noticed one cat, ten-year-old Mr. Wilson, had a missing patch of fur (about 2 x 3 cm) exactly where I had applied the Advantage! Why all of a sudden this reaction? Another big, recent annoyance is that each capsule would not open properly the way it is supposed to. After inverting the cap and twisting, the small plastic "pin" snaps off but still leaves the ampule sealed. Rotten quality control! Pay more money for less quality. Why did Bayer quality go down the drain? I'm going to the vet to ask for recommendations (NOT another Bayer product!) Lot No. KP0BNWK KP0BJ1C