My cat kept escaping the patio area by climbing our wood fence so I decided to give this a try. I was scared it would be too aggressive since this is mainly catered towards dogs, but I was pleasantly surprised with the results. We wired the fence at the top and mid-way to keep him from escaping. He is a big cat, so the collar doesn't look too goofy on him but if you have a small cat I would imagine it would be a little big. The the most difficult part of setup was having to drill our wall in order to keep the electrical components inside since they are NOT suitable to being outdoors. Other than that, it wasn't too bad. Everything worked great!