@Bawkbok @Eggcessive Thank you both so much.
Tilly was one of my first 6 chickens. EEs from
TSC. And it seems reproductive issues have been rampant with them. Or perhaps it only appears that way since they're the "older" bunch.
I do think Tilly has been having issues for a little while before these episodes started, maybe? I'm trying to rack my brain on a time frame. Tilly used to roost on top of the coop all the time with everyone. She'd jump up there, jump down, all that. But eventually she stopped doing that. Trying to remember exactly when that stopped. I know she was just doing that October last year. That was during fowl pox, so when tending to everyone, I saw her up there a ton. Plus, she and the others did that a lot to avoid my rooster. But he randomly passed away February 13th, without warning. I feel like February I might've seen her trying to hide from him rather than get on the coop. It's hard to say about roosting since everyone alternated being on the roost or cuddling up in the deep straw to stay warm. I think I remember her roosting in February/March during a very cold snap we had. So I guess this hasn't been visibly going on for too long.
I do want to add that between episodes, she was still having some lethargy and trouble balancing. Resting a lot during foraging and not doing any jumping up on things. Of course, that makes sense, considering the ordeal she was going through. Her legs would start to strengthen again, but it would take her almost a week before she could balance on my arm again when picking her up. And she completely gave up on roosting entirely since March. I had been trying to boost her with Nutridrench (since that has thiamine and vitamin E in it), which might've been helping a little. Who knows.
Anyway, sorry for rambling. My brain's gone into the whole "what could I have done better, what did I miss" mode. So I just wanted to put this out there in case anyone with similar issues can glean some info. Of course, only a necropsy can really answer. Debating if I should get one or not. It definitely seems very one-off. I may just bury her with the others under their tree. If I do just bury her, I'll definitely get a necropsy done on anyone repeating the symptoms. They're pets, so I'd rather "keep" them and lay them to rest here at their home with their other friends, alive and gone. But I definitely would part with that ideal if it seems to be something that could risk everyone.
Anyway, thanks again everyone for the help and kind words.