Have been using castor oil on serious wounds on horses for over 12 years, we are talking wounds where you can put your whole fist into, horses that vets have suggested be put down immediatly due to stripped tendons. We had one horse who staked herself on a metal star picket and since she was in a paddock of 1280 acres we hadn't seen her for a couple of days the wound was not able to be stitched. Vet recommended put the horse down. But as she was walking and eating and drinking normally we thought we would give it a go with the castor oil, we poured the castor oil into it and wrapped it up, making sure it was clean first. Put it on everyday for 5 days then every 2nd day for another week then every 3rd day without bandages for 2 weeks, it healed without a scar and the vet was amazed. Since then have used it for every wound with success everytime, keeps flies off too, but does go yucky for the first 3 days and you question your self every time, but it has never let me down yet and minimal scarring everytime. it heats up and the beautiful thing is that I don't have to touch the wound which makes it great when you have unhandled horses and cuts on their back legs, just pour it in the wound and get out of the way.