Worked Great ! I used it on my 2 dogs, Chihuahua cross and puglab-rettiever. I used very little just enough to clean the invested area with a Qtip. The second time I squirted a drop into the ear because my dog was still making noise about her ears. My cats, I did the same thing you need to be extra careful with cats because they will get pissed off and spread it where it should not go and then you end up with problems. You want to use a very small amount and only get it inside the ear where the mites hover. Like any product that you are using to kill an investationalways spot test. if you don't feel confident enough to properly distribute treatment it's best to bring your pet to a professional who can.