Solution

O + A + + + + + + + + + + D H 
+ L + S + + + + + + H + E + A 
+ + D + O + + N + O + R + + N 
+ + + E + O A + L + B + + + O 
+ + + + N G L S + H + + + + V 
+ + + + R B T A G + + + + + E 
+ + + O + E U U P + + + N + R 
+ + M + I + O R + P + + A + I 
+ + + N + R + + G + A + I + A 
+ + E + O + + + + E + + B + N 
+ R + H + + + + + + R + A + + 
+ + T + + + + + + + + + R + + 
Q U A R T E R H O R S E A + + 
+ + D E R B E L D D A S + + + 
+ + + + + + + + + + + + + + + 

(Over,Down,Direction) 
APPALOOSA(11,9,NW)
ARABIAN(13,13,N)
HANOVERIAN(15,1,S)
HOLSTEINER(11,2,SW)
MORGAN(3,8,NE)
OLDENBURGER(1,1,SE)
QUARTERHORSE(1,13,E)
SADDLEBRED(12,14,W)
THOROUGHBRED(3,12,NE)