Chicken acting off but not sure if sick

[Trent Seelye]

My leghorn that’s around 8 months old and has been with the flock her entire life, has now started to hide and sleep in the nesting box and I had found her this morning hiding in the corner tucked behind a shovel as to not be picked on. When I moved her out she started getting bullied so I put her back and gave her some food and water which she drank. Not sure if she’s sick or being bullied too much. She does seem pale and a little wonky while walking but eating and drinking fine. Any tips on what this could mean would be appreciated