Yet another Poorly chicken thread, sorry!

Hi

I went out to my girls this morning, and one was lying on her side, I thought she was having a dust bath, but she stayed in the same position for ages.
Went in and picked her up, and she wasn't able to stand on her own.
I've put her in a cat basket, and brought her inside to keep her warm, and she is now standing but very hunched and sad looking.
Could it just be an age thing (she is about 3) and that she is nearing the end of her time, or any other suggestions? The other 5 all seem to be absolutely fine, but obviously I'm worried it could be something infectious!

Many thanks
og

Thanks Brambles

She seems to have perked up a bit, I've put a bowl of mixed layers pellets and corn in for her, and can hear her pecking away - perhaps she just had a hangover or something!

Won't put her back in with the others until I'm sure she's ok, have also rung the vet, and they have some appointments tonight, so will make one if she doesn't perk up some more.

Have had them nearly 3 years, and it's the first time any of them have been poorly ( rang up my partner in tears, and he was in an important meeting, bet they all think I'm bonkers now!!!)