I've raced several over the years, and I can think of about 6 or so that I was sure were RACE HORSES the 1st time I hitched them as babies. I always start mine out barefooted and decide how to shoe them from the way they travel. The best ones require nothing but a plain shoe to keep the hoof from breaking. My best trotting filly wore 4 aluminum plates, and a short foot. She was just a natural, and as a baby she could trot a 1:55 lick for short bursts if something spooked her, and never considered making a break.
A big trotting colt I had could trot effortlessly in 2:40 the 1st time I hitched him. He went on to be a nice 2yo, but got EPM at 3 and never reached his full potential. I switched him to the pace and he could pace around 1:53, so he made some money.
Others are really slow to come around but still make great horses. My downfall was always hanging onto ones with no talent hoping they would come around. That just wastes money. (belive me I know)
