Goodness, I must have the world's most unusual TB since they're all supposed to be scrawny unless you feed them a ton
JJ is the very definition of 'easy keeper' and the pictures I saw of him taken at the end of his racing career don't show a skinny horse. Sure, he eats more than my Arabians, but he puts on and retains weight quite well and I sure as heck don't give him pounds and pounds of grain every day.
Racing fit is not
skinny. Lean and muscular look nothing like that scrawny stallion you're touting OP. Even if he weren't too thin, I don't like his build at all.
Oh, and if you're hoping to get into veterinary medicine, you really need to up your game concerning your spelling and grammar. They're both atrocious.