Thanks for replies! Yeah, it stopped bleeding, plaster is still holding on and hen acting fine. I was worried it would keep on bleeding, but seems fine, eating, not limping.
In the hills: most of my hens are quite tame, although they don't like being picked up, when I bring one in the house and set it at the side of the sink she doesn't mind me poking about with it.
Will the claw grow back or will it just harden up a bit? I'm so happy it's dry and dusty outside and not all wet and muddy!