Hi, Iam a newish goat mummy too, I have two Pygmy goats, now 3 years old, this forum site has helped me so much, the people are all so kind and helpful.
Now then, my wether always seemed like yours in body shape, he eats a lot, has forage, pasture, good hay, minerals, salt lick, and small amount of Pygmy goat mix, I also give garlic, pumpkin seeds to help keep worms away… so far after fecal testing never had to give worming meds. He jumps about and boss of my doe. My boy feels bony on his hips too. I was told when he was young, that he might just be a skinny goat, I know it’s a worry for you, and Iam not the best to give advise, others are far better for advise, but I just wanted to share about my boy……but your baby seems to have bit more going on, so perhaps a vet is needed for maybe blood tests, thinking of you, love from UK xx