Stop glue factory from using horses, donkeys, and other animals

It is estimated that around 100,000 horse are sent to the glue factory every year in America alone they have already developed a way to make glue with out using horses. How come they can't use that how come they hurt loving creatures of God we love horses as a horse family and I have my own horse named Rex We need to stand. We need a law that prevented from happening we must stand against glue factory, using animals and horses.