Foal specialization trait
A foal inherits this from a parent.
33% chance the same as the mare.
33% chance the same as the stallion
33% chance it will inherit the sum of the shows the parents have entered.
This specilization trait can be influenced by adding spec points to the parents prior to breeding in an arena.
The horse will not increase in level, it will change the number of shows entered but the horse WILL NOT enter shows.
For example if a parent has a T on English but you would like the foal to be racing. Add racing spec to the mare. It would seem that a spec of about 80% is enough to influence the outcome of a foal.