The Imp 

dressage: +4, gallop: +9, trot: +9, jumping: +9

stamina: +11, speed: +11, dressage: +11, gallop: +11, trot: +11, jumping: +11

stamina: +4, speed: +4

dressage: +8

stamina: +8, speed: +8

speed: +6, dressage: +6, jumping: +6

stamina: +9, speed: +9, dressage: +9, gallop: +9, trot: +9, jumping: +9

dressage: +12, gallop: +10, trot: +10

stamina: +2, speed: +2, dressage: +2, gallop: +2, trot: +2, jumping: +2