You can see your reroll count on your stable page beside your avi. If you have rerolls, there will be an option to use them under manage your horse on their page.
Gem We usee.. -Click- its been very good to us We had to change so we could get it from someone fresh because rural king killed off so many because of old feed Any kind of tall grass, clover, alfalfa all can be grown you just might need a lot