I got 4 BHWT hens last Wednesday - commercial free range rather than battery but I had to double check as they looked awful and were very wild, half feathered or very little feather at all, but they seem to have come along a bit in the last few days except that only 1 will go in the coop with the 4 existing hens, the other 3 prefer to shelter in the wee pen I had them in the first night they arrived, with an old horse rug over the 2 mesh sides and space at the back for ventilation..
Last night I was out til 9pm and as they'd all started taking themselves to bed at last, I just shut the coop, draped the blanket and left the pen away from the wall rather than push it up tight to block the entrance as I couldn't see and didn't want to disturb them by moving the house over their heads!
Except it was a very cold night and this morning I found one hen had overnighted under a wee bush outside on her own, and the other 2 were end to end in the wee passageway behind the pen so had very little warmth from each other and the wee-est one was looking very sleepy and chilled

The rest responded to breakfast etc as normal so I brought the wee one indoors and managed to get some warm water and powdered glucose mixed up and syringed in tiny amounts down her beak

eventually she started pecking at grain etc so she had another hour in the kitchen in a cat basket and then went out at 10, seemed far more mobile etc but by 11 was getting harried by the existing hens as all the newcomers are occasionally except she wasn't running away like usual so I've had her back in the cat box in the run withher own water and food, which she is taking - she had a good drink when I had her loose in the pen that hour as I was very relieved to see..
But how to reintegrate her? I am thinking of leaving her in the box til after dark and popping her in the nesting box at the side of the coop when the girls go in for teh night, so they will hopefully include her in the hen huddle if it's cold and not pick on her

I can go out before light in the morning to let them out before the hopefully see her and I wonder if that is all I can do?
I wish I had a wee hen jacket with wing holes to hand but I don't! I'm hoping rest, food and then coop huddling will sort her out but because she's deformed and tiny I am worried obviously..
Any ideas? I tried oatmeal porridge with a bit of brown sugar stirred in, but she didn't seem keen and the others wolfed it when I tried them with it.. I wonder if I'm doing her favours keeping her going but until now she's been very feisty and her neck doesn't appear to prevent her eating, drinking or preening what few feathers she has..