Oh Boy. I’m not a good one to ask but to get you started, and I hope someone else jumps in, canned pumpkin…not the pie filling but straight pumpkin…is high in moisture and fibre and sometimes they’ll eat that when they won’t eat anything else, once you get them to take a taste or two of it. She could have quite a bit of that.
Sounds like you know all the stuff to get to help this baby along, though if she’s eating pellets, hopefully you’re going to be OK. I’m doubting she’d be eating that many Good to keep her exercising and moving about. I’d probably consider being “bad” and offering alfalfa hay, but you said you’re going to. I think a 20g needle would be OK. I definitely wouldn’t go any larger than that, and, of course, 25g would take forever. I can’t remember if there’s an in between size?? Just the baby simethicone is fine. This is brief, but you sound like you’re off to a good start and I’ve not treated for this and don’t care to, but that’s what I can think of right now.
And have you held up the grassy hay right to her mouth? Sometimes then they’ll take it. I’m sure you’ll get other good ideas from people, but wanted to get started because I know you’re eager to get to the store. All the best.