I have a grown silkie hen, zsa zsa, who I got from a friend when she was full grown and laying. I have no idea how old she really is. For the last three years she has been active and laying eggs and was on schedule with her broodiness (oh how my silkies love to be broody). About 3 weeks ago as she was coming out of her most recent broody stage she just hasn't been the same. She comes out of the coop very late compared to the others, stays away from the two other girls who are out and about (there is still one broody) and really just stands there most of the day. I have seen her eat and drink water but after 2 weeks (which is the time it usually takes for them to start laying after being broody) she hasn't laid one egg. She is also usually very vocal and now I hardly ever hear her. Also when I toss the girls treats she doesn't really react. that's how I know something is wrong I noticed her backside feathers being dirty from runny poop so I gave everyone a cycle of corid. her poop looks better (only a chicken lover admires a good healthy poop) but her energy still seems very low and she is not acting like herself I currently have them all on nurti-drench and have been administering it directly to her via a syringe a few times a day thinking some vitamins will help but I'm not seeing much of a change. I don't have her isolated as she doesn't really seem sick and all the other girls are acting fine. Does anyone have any advice? Is she at the end of her life span? how long do silkies live? I'm not sure what my next steps should be besides seeking the help of a vet.