
Trying to Breed More Jumping Ability
My current crop of jumpers have only about 40% jumping ability and I was trying to breed more jumping into my horses. I scoured every auction for a few seasons and the best stallion I could find was:

Not exceptional jumping. but better than I had which looked like this

I bred the stallion about 50 times with my best mares and about 90% of the horses I bred had less jumping ability than my current crop. The other 10% had only the same jumping ability as I already had.
So I scoured the sales for another couple of seasons and found a couple of likely stallions to breed with.The strange thing is, these stallions again produced worse jumping than I already had.
Does anyone know if jumping ability should breed true or were the 3 stallions I picked just an unlucky bunch?