Originally Posted by WSArabians
Huh. Interesting. I heard mayonnaise works too.
Mayonnaise is oil and eggs - both make the hair shinier, I guess that is why it works. I give underweight horses a cup of vegetable oil twice a day and beside them gaining weight they get a beautiful coat. Not sure if eggs are easily digested by horses, but I give egg yolks to cats and dogs that need something extra.