chicken lays out in sun and goes to coop earlier than all others...is she ok?

[hannahchicken]

I have a flock of nine and one of my birds (all are around 3 months) lays out in the sun all outstretched with one leg out all the time and by herself. Ive seen them all do this so I know it's normal behavior but she seems to always be like that. She also will put herself to bed a good 2 hours before the rest of the flock goes in. Is she ok? She seems to "cough/sneeze" pretty often and I was worried of an illness but she eats, drinks, begs for treats, has normal looking poop, etc.
If it helps at all she is a cuckoo maran if that helps with anything.
thanks!

 

[aart]

Coughing and sneezing the sign of a respiratory illness,
she may not be ill enough to totally stop eating and drinking.

She may recover, as she builds immunity, or she may not.