With heavy horses and getting them ready to show, pig oil is rubbed into the feathers and left for about an hour, this raises all the debris to the surface. This is washed off with hot water and soap and rinsed well then wood flour is rubbed into the feather to dry and to fluff them up, this is then combed out when the hair is dry.
I have used pig oil painted with a paint brush, on legs to help stop the mud adhering.
Also, pig oil with flowers of sulphur held clear scratches.
To oil legs and leaving it on, is asking for problems when there is strong sun out as this can cause sunburn especially on white legs.