I started using Canna-Pet drops for Rush, my retired racing greyhound, for arthritis and stiff joints. I noticed after about 2 weeks a reverse sneeze that nagged him had simply disappeared! So, not only did it help ease his arthritic joints it also helped with his nagging reverse sneeze issue. My other greyhound, Lovie, suffers from noise aversion and I had difficulty getting her outside when there were fireworks or any loud noises. I decided to give the wonder drops a try. Sure enough the product works!!