From the 22nd of March until the 30th of March, there is a lottery event going on. You can buy two tickets for yourself for 200e, get some from your friends, and get a ticket every time you use a pass (not on a horse purchase). For every drawing (there are about 8 a day) one person wins Balios. Every ticket wins something, however.
Balios is one of the Divine horses on the game. Balios cannot be sold to other players, so the only way to get one is to earn one during a promotion or contest that Howrse holds. There are many, many kinds of promotions, and a lot of them (but not all) give you a chance of earning a Divine or Speical horse.
You cannot sell Pearl, but you can sell: Sleipnir Xanthos Balios Croesus Gypse Falabella Archie Harliquin and I think a few more can be sold. Sources: Over 140 days of experiance on Howrse' PM me at tmh on International Howrse!
Sapphire, Ruby, Gypse, Balios, Ocean, Mist, Cowbra, Archimedes, Snow, Croesus, Xanthos, Greyfell, Spleipnir, Harlequin
You can get Falabellas on howrse by buying them if anyone is selling them and promotions there is one currently running called wandering horses when you get all the horses you get a balios witch is for the first 10 players to get all the horses and for the rest of the people they get a Falabellas
Sleipnir, Xanthos, Sapphire, Ruby, Gypse, Balios, Ocean, Mist, Cowbra, Archimedes, Snow, Croesus, Xanthos... 13 Sophie ♥x♥
you have to enter the lottery its new on howrse if you are talking about the horse pearl
pride
By the Jade horse
Buy it or win it in one of the monthly competitions
though HOP's (Horn of Plenty) which can be found in the "Black Market" on Howrse, open it in the luck of finding one. NOTE: You won't automatically find the gem horse, Howrse will tell you on the News Feed when they're in the HOP's. also, you can win them in contests Howrse does every month!
you win them in horns of plenty
Shires are Draft Breeds - and Howrse doesn't have Draft Breeds. Chances are, if anyone has one - it's an altered Friesian (the closest Draft breed we have). There are various 'Belgians' Clydesdales' and 'Gypsy Varners' on the game that are nothing but Friesians with Diamond Apple coats