Ours are chunky too. I thought that was from their sire, but it must be from the cows. They look beefy compared to CorreDhu's who look more dairy.
We'll sell heifers for breeding - we're only keeping two cows as that's all the grazing we have. If we have bull calves, we'll have them cut and kep them for beef.
It would be good to know the breeding of your boy. He'll be old enough to work next August, for sure.