Strange, we had a similar thing happen today, although the symptoms sound slightly different.
I thought our Columbian Wyandotte was shivering, but soon realized her legs were shaking. She can push herself up to a shaky standing position, but puts her wings down for support and mostly sits. She is mid-molt and was shockingly light weight.
We put her indoors in a cat carrier. I offered a dish of feed mixed with a little buttermilk, and she acted ravenous, taking huge gulps until it was gone. She drank a lot too. Mine doesn't have the head shaking, or look puffed up. Just weak in her legs, with no obvious sign of injury.
This same bird had recently (2-4 weeks ago) started sleeping alone in a small community nest box under the roost. There were a couple days she didn't get up right away, but she was in a major molt, it was cold, and a few others stayed on the roost too.
I assume she must have something wrong, unless she was weak from molting and got chased away from the food repeatedly (?). She is not the lowest on the pecking order. For now, I'll see if she improves with lots of high protein food.
Did you separate your Orp? I had a very sick bird once, -no idea what was wrong, other than mites. We treated her with Ivermectin and had to force feed her for days, but she sprung back. It took weeks before she was running around acting normal.
Good luck. I'm always at a loss for what to do with a sick bird.
I'm loving your goats!! Their little floppy ears are too cute. Do they get along well with the chickens? Is your doeling going to be your primary source of milk? I'm going to watch how that turns out. I like Saanen goats a lot, but I've never personally known anyone to keep a dairy goat. I do have a friend online who's in love with Nubians. My only reservation is that it's difficult/impossible to get butter out of goat milk, which is why I'm more pulled to the idea of [someday] owning a dairy cow instead.
