When were they weened? Most goats nurse 3-4 months. Granted I weened my own bottle boys at 2 months because they were eating forage full-time by their own choice and the bottle had just become a treat to them.
Goats can get HUGE rumens. They can get 3-goat-wide rumens. And when they're super packed they do stick out on both sides. Especially if they're surrounded in endless delicious food and they love to eat. I have 2 goats that eat endlessly and keep huge rumens, and 2 that eat conservatively and never have large bulging rumens. These two are also the most active two of the bunch. Everyone's a thick healthy weight, I chalk it up to personality.
In my own
experience, goats are pretty tough. Some folks have had experiences in the opposite. I personally don't feed any treats/oats/beet/grains/etc. They get to forage, and if there's no forage, they get grass hay. My goats have sleek soft, silky coats, no fish-tail (lack of hair on tip of tail due to mineral deficiency), and are robust and healthy. I do keep a cobalt mineral block out and supplement loose minerals high in copper. It's been my experience that minerals are the most important supplementation for goats. In the wild they roam huge territories and they will seek out minerals; licking rocks, eating gravel, and actually rooting up clay and minerals on the ground and eating them. They don't get those opportunities in a pasture or pen. They also LOVE bark,
wood, and tree matter. It's way better for them than grass. They're browsers, not grazers.
Any time my own goats get into grain they instantly get the runs. They need fiber; long plant fiber. Short plant matter, especially short wet plant matter, as well as grains and such don't have the fiber their rumens need and it gives them the sh*ts. This has been my experience at least.
I guess at the end of the day, in my opinion, if a goat is on its feet and wants food, it's fine. A goat uninterested in food is a giant red flag though. I would chalk the crusties on this doeling's bum up as just a part of childhood
I had one goat recently poison himself on false hellebore. I rip that crap out whenever I see it, but he managed to get into it and eat a bunch. He was projectile vomiting and feeling a little rummy; which was good,
IMO, because his body was ejecting the FH plant matter. Regardless though, he was on his feet and wanting more food, so I gave him a huge dose of activated charcoal and held my breath. Next day he was right as rain, thank goodness. Now I watch him and he'll sniff a FH plant and turn away in disgust. Phew.