Hello, I own a Quarab. I take him in led in ect. If your horse has long mane example 20cm long, I would cut it with sciccors to about a good 3 inches or so. Then start pulling. My Show horse, Billy has a very thick mane, and those pictures you showed us are a classic example how most quarter horses are prestented. Basically they do chop the mane straight, and they get little sections and put rubber bands in them, so they are seperated. I know a fair few breeders (qh) who show there horses like this. But yes as a Dressage and Hacking judge, I hate seeing bobby mane.