I didn't realize how unusual it was until I decided to start brushing and using conditioner on my older gelding. Just for giggles to make him "pretty" like other people's fancy horses. I soon started to notice mats and tangles. And was suddenly brushing it out every few days! Hated it! I stopped all the fuss, except to finger out tangles and it eventually went back to normal. His tail ended up getting a nasty tangle in the center that I had to cut out. =/ Not making that mistake again! Even my fluffy, white dogs are sparkling white after a few days. Solid muddy swamp monsters one day, beautiful snowmen the next!