Hello, I am a bit worried about one of my chickens. The last few weeks she has spent a lot of time sitting down and relaxing but would get up to greet us (especially if we had treats) and she has been scratching around in her recently extended run. Today she put herself to bed at about 6pm. I went out at 7.30ish as i thought it strange for her to be indoors so long. She let me lift her out no problem - she isnt usually difficult to handle but she didnt even flinch this evening. I put her on the lawn - usually this results in her nibbling at the grass but she didnt seem to want to stand and just sat there, i went inside to get some things and when i came back she was still just sat there. I gave her a cuddle, checked her over, seems ok but did have a dirty vent which i cleaned. I couldnt see any mites but we do struggle with them, however i powder the chicks and treat the coop regularly. Her eyes seem clear but she did keep closing her eyes like she was dosing off. I checked her feet and cant see any injury or sign of scaly leg mite. I did feel her crop and it feels large, (my other chuck did not want to be caught so i had nothing to compare with.) I gave her a small syringe of oil and massaged her neck but as it is the end of the day- i guess that could be why her crop seems large. I am goign to start worm treatment tomorrow in case this is it. It has also been really hot the last few days! She is rather old. We got her from a commercial free range farm EOL at 16 months just over 2 years ago. I read in a magazine that comercial chickens are usually killed EOL so are only bred to live for 18months-2 years so maybe she is just getting old? I dont know what breed she is as she is but a hybrid bred to lay. She hasnt layed for about 9 months, Her sisters that we bought at the same time all passed last winter - summer. She now lives with a bluebell chicken who is showing absolutely no signs of illness. Any ideas?