Horses show a large variety of coat colours, much like human hair. Note however that in contrast to hominids they can have contrasting points of different colour: mane, tail and lower legs ("socks")
A horse at the Pride of Poland show in Janów Podlaski
To make small, round shapes out of cardboard use an office hole punch (available also with funny hole shapes nowadays) or better still a DIY punching tool used to make holes in leather belts and the like »