We are new to chickens. Had them about a month. We had to the smallest one (5/6 weeks) died suddenly last night. I thought it may have accidentally got squashed. Then this morning, I found it's mate dead. A few weeks older it was. No sign of injury or blood or feathers from being attacked. They were both looking normal during the day before so I don't think they were sick. So I assumed it fretted and died. These little ones were in a seperate area to the ones below. Now this arvo, one of my adult hens looks sick. She's our favourite. I have no idea what to do. Vets are closed for the day. She's lethargic but eating and drinking. I've just noticed she seems very thin under all those feathers as I can feel a pointy bone protruding from her chest area. She was laying but stopped about a week and a half ago. We got a new hen a few days ago and it seems to be trying to pull out feathers on top of her tail area. I'll attach pics. Help appreciated.