What happened to her that she ended up in poor condition when you got her? It seems like you mentioned finding out some about her past. As I recall (without scrolling back up) from her young pictures she looked good but something must have happened to her between then and you. Maybe you mentioned this and I’m just not remembering…
Is she continuing to eat better? She looks much happier and healthier to me under your care but her weight seems to be coming up very slowly when I look back to the beginning of July. IME/IMO, which isn’t the end all/be all by any means. I know you’re doing the best you can for her and that she shouldn’t bulk up too quickly but I’d be tempted to up the feed, remember to do those carrot stretches, etc. I couldn’t sit on her right now in good conscience; her spine is too exposed.