Cross posted in hopes of fast response: I have a cochin that went broody so I purchased three chicks and put them with her last night. This morning I check on them and they are all well but Twigs is still acting broody and refuses to leave the nest. Anytime a chick ventures out she aggressively pecks at it to the point of distressed chirping and causing it to fall from the nesting box. Is she rejecting them? Should I remove them from her? I am concerned about them being denied access to food and water. TIA.
You dont specify how long she has been broody? Many hens will adopt day old chicks but not early on in their broody cycle...many need to sit for a week to 10 days before they will even consider adopting. Some won't until closer to day 20 or 21, each hen is different. You can't just give them to the hen and let it go at that, many need help through an adjustment period (both the hens and chicks) and sometimes a hen will come around after a few hours but if she has scared the chicks during her initial reaction (which she can't be blamed for) then the adoption becomes about impossible and as PD Riverman said you will need to pull the chicks before they are harmed.
Search this thread under my name for post with words 'stages of broody hen'... I detailed the problems more in it. I am on mobile and have limited search capability right now.