That's really helpful! I managed to get both charcoal pills down her with minimal effort this morning without an additional person - the towel helped a lot. It's really the part you mentioned about worrying that I will hurt her that I get stuck on. She's got a malformed beak (a slight cross-beak with a little hump in it, and one naris that's more closed than normal too), so the prying open is relatively easy, thankfully.
I think she's improving. This morning, there was much more solid and less water on the dropping board under her spot - a few actually normal looking droppings, but I could tell they were hers bc they were dark gray from the charcoal. She still had a hard crop this AM, so I gave her more coconut oil, and she eats it readily, so I didn't have to pop it in her mouth. I left her for about 10-15 min to eat it, and her crop was soft without massage when I checked again. She's alone in my hoop tractor thing inside the foraging area within view of the others, and she seemed to be more energetic than yesterday - she was digging a lot, and even flew up on the blue barrel (before I separated her), which I'd never seen her do before - I think she's lost enough weight that she can get up there, but at least had the energy to do so. I hadn't really realized how subdued she'd become recently - it had been a slow process, with lots to distract me in the last 2 wks.
While I hung out, she had a few small solid poops, which also seems to be an improvement over yesterday, and wasn't guzzling water after the coconut oil either - more normal. I'm keeping her separate for an hour or two, mostly so I can monitor her intake/output better.
I did find 3 small allium shoots, one of which had been bitten off, so I will have to keep a closer eye. I think they'd leave them alone if there was any other tasty green to be had in the run, but nothing else grows there, of course - just the bulbs that can survive under all those wood chips and constant digging.