They should be fine.
Nothing wrong with lean meat. Actually, a lot of people pay extra for it.
I see these people that are feeding so much feed to the cows, and they think I'm crazy for the little amount of grain based feed that mine get. When they butcher and throw all that fat away (or add it to the hamburger), they are deceiving themselves.
I'll put up my lean Angus beef against those type of feeders any day of the week. So much of the beef flavor, texture, and tenderness depends on how it's cooked....