I find a lot of the equine artists I come across are Russian. I was curious how many, so I went through the last 70 pages of my favorites and pulled out all the artists who draw mostly (or just a fair number) horses. So here's a nice list of artists if you're looking for some :p

Russian:
anuta_belko
Frontarika
ponynok
Dankos
Alai_Aorax (Belarus)
Dif_Diffary
AriesRedLo
Carota17 (Ukraine)
jetraraven
blacklawliet
Chistokrovka
wiredhooves
MUSONART
Shadow-Twilight
NikolaosFlamel
Lenika
interu
Anisis
AlsaresNoLynx
Proma8651 *
NorthWoood
Mr_Ais *
sellyoursold *
bloodyknight

*Indirect evidence, Cyrillic characters in filenames.

Elsewhere:
---Storm---
Heinrich_darkHOUND
SpytSpecialties
Neala-Appaloosa
Sabotteur
Loonaris
BlueNire
balorkin
VenLightChaser
plaguedog
In-Facto
Stasis_Delirium
Nae
Nonosama
konikki

I find this to be a curious phenomenon, but I can't say I know much about Russian culture.