No bloat or swelling , but she sound terrible - like its flue or cold. I am not really familiar with chickens , so do not know how to explain correctly.
I'm very sorry.I got this 2 chickens on Tuesday and looks like she was fine , but next day she stay in the coop all day. Today I tried to take them out and find out that she was this problem. I got 4 small chicks yesterday, but they stay in the room under the lamp. I am afraid if this is some virus, it could transfer to my small chicks. I am panic, can't loose any of them.....
I hate to say this, but can you take her and the hen/pullet back to where they came from?
It's hard to tell, but the leg problem might be a leg deformity or possibly due to a disease like Marek's. More concerning is your mention that she sounds terrible like she has a cold/flu. There are respiratory diseases that chickens can have that make them carriers and it can be transmitted to other chickens.
It would be good that you try to take bio-security measures between tending to these 2 and your chicks. It's very hard in a backyard set-up to control disease once you have it.
Not a popular idea, but culling the one that is sick may be the best thing to do, but the one she came with is likely a carrier if you are dealing with respiratory illness, she is just not symptomatic.
Seeking vet care and/or getting testing through your state lab would be a good idea so you know what you are dealing with.
Your State Lab:
https://cahfs.vetmed.ucdavis.edu/
Common Poultry Diseases:
http://edis.ifas.ufl.edu/ps044
Information about Marek's:
http://www.backyardchickens.com/a/the-great-big-giant-mareks-disease-faq
