I'm glad she seems to be improving.
Draining is sometimes a temporary measure to bring comfort and improve quality of life. The condition that is causing the fluid still exists.
You may want to do a little reading of posts by
@coach723 about giving aloe detox to hens that have fluid/reproductive issues. While still not a cure, she has had some success in maintaining hens for a while by doing that. Here's one thread where she talks about it, but if you search "aloe" and her member name, you will likely find more. Plus I tagged her, so she may chime in for you too.
https://www.backyardchickens.com/th...breath-if-you-hold-her.1284253/#post-20750855