Bests & Worsts Reviews from Amazon

After years of using this product (Bayer Advantage II for Large Cats over 9 lbs) on my big kitty, with NO problems, the last application left my baby with a burn mark exactly where I applied the medication - in a long line down the back of his neck, exactly as it's supposed to be applied. They must have changed the formula, as it was also yellowish in color and had a slight odor. Paid TOO MUCH money to have this happen. Now I have to throw away the rest of the applications I bought, and I bought 2 packs of 6 to prepare for the months to come. Super annoyed, and now I have to find something else that works. Why do they have to mess with something that worked?! WASTE of money.