I have been watching my goat lately and putting him out to free feed, instead of in his pen on hay, on the new shoots coming up because his flanks seems sucked in. He hasn't gained any weight yet. We did worm him a couple days ago. I was curious am I missing a supplement like a mineral lick or type of a extra feed(or grain) that would help him? Or is that normal for a goat when they reach a year old to start looking a little more slender in the flank area? Sorry I'm new to goats and just wanted to make sure if I needed to do something different. Thanks for any advice.