Foals are the end result of a breeding program.  It is a challenge to cross mares with the stallions that you think will compliment them and not take your program backwards.  The ultimate satisfaction is to raise a foal that is better than its’ sire & dam.  This sounds easier than it actually  is, as there are genes in the background of the parents that will show up and give you attributes that you aren’t expecting; sometimes good and sometimes not.