My at the time one year old filly Juri developed a sarcoid by her eye.
It did not grow or change, for several months it remained the same size and shape. About 1cm big. I started applying Renu28 gel, though not with much consistency.
Even then the sarcoid begun changing - it got longer and pointier until it was only hanging in by a thin stem. At last it fell off all by itself.
The treatment took 3 months. Juri is now 3 years old and the sarcoid has not returned.