She perked up more as each hour past. By the next evening she was back to normal & even laid an egg, having only missed one day after the soft shell. That turned out to be the only egg for eight days, laid two more, then nothing since the 11th.
I'm now concerned again. While she appears active enough, she spends a lot of time standing or sitting with her neck pulled in, with her head tight to the rest of her body (if that makes sense) we noticed that she'd lost a few feathers recently, but today it's apparent that these are concentrated areas, mainly on the top of her wings. We have two other hens, which are buff orpington crossed with welsummer. They all get on well, & have been together for 11 months. One of the hens has been a useless layer, & laid only a dozen eggs in her 1st 12 months. But has been better recently, but is broody again, spending most of the day in the ark waiting for an egg to sit on. I caught her pecking the light Sussex tonight, in the same area as the feather loss. This might be a coincidence. But I thought the more I tell you, the better chance you have of solving the problem.
Any advice would be appreciated.
Thanks again.