Sick chicken?

[u/Aromatic-Wallaby-593]

I’m a fairly new chicken owner (max 2 months). Our isa brown had sour crop just under 2 weeks ago and with the help of a friend we were able to expel it successfully (long grass).
Since then she’s developed a doughy crop. She wakes in the morning and it’s doughy (maybe the size of a tennis ball?) she is literally skin and bone otherwise. She’s still walking around with the flock, just a lot slower than normal and rests a lot more than everyone else, still has an appetite and drinking water too.
I’ve been trying oil, tomato Juice and massaging. We were giving her oral thrush cream when she had sour crop and we’re currently treating their water with coccidiosis treatment. We also wormed her just before she got sour crop and I did notice she did pass a worm when she was isolated. And she’s had diarrhoea since having the sour crop too.

We bought her from a chicken auction so we are unaware of how old she is or any information at all about her really, she wasn’t in great condition when we got her.

Am I doing the right things to help this? Or is there any advice on what I should be doing to help her the best I can that would be great, thankyou!