I am an avid dog and cat owner and want to get the word out on a hidden risk out there for cats...... BEWARE over the counter tick medicine that is applied to a cats back. It is extraodinarily toxic and is killing thousands of cats a year that suffer allergic reactions and or lick it off into bloodstream and suffer near fatal to fatal poisonings. It's also CRITICAL to never give a dogs Tick medicine to a cat. Its a near fatal mistake. Its far more prevalaent and happening and a simple mistake here will kill your cat. My wife made this mistake last night and applied wrong medicine on 2 of our cats and it was a very distressing situation what this tick medicine can do to a cat. Full Nervous system breakdown and tremors/loss of motor functions. Luckily we caught it quick and had immediate attention and Cats appear to likely survive this. If this post brings any awareness to issue I feel better.