Phil - when you said in another post (or in chat, I can't remember) that your yearling were 4' i Thought

"that's way too big for yearlings" but before I said anything , thought that I'd better measure my yearling coastals.

HHmmm, the small one is 115cm and the bigger one about 125cm. So I didn't say anything!

I'd consider mine to be a very healthy size, possibly even a bit small for their age as both were late starters in the eating stakes and I definately don't overfeed according to most information I can find (10-20% BW 10-14days)

So don't worry, be happy! BTW, my 3 year old is only 150cm long but about 10 times the body weight as she is so much thicker.