I had a 4.5 mo RIR pullet die suddenly this morning. She was getting close to laying, but had not layed her first egg. She, as well as the other 22 birds in my flock have been fine. No problems at all. I do not let my birds free range, but they are in a huge fenced in chicken yard. Yesterday, all of a sudden, Polly was found laying away from the others and would not move to eat or drink. I put her in her own kennel and gave her about 5 cc of water and 2 cc of sugar water with a syringe before she went to sleep last night. Checked on her this morning and she was gone. I haven't noticed any changes in poop or anything. All of the other birds are fine. Any ideas on what could have caused this? Should I go ahead and worm everyone or start a round of antibiotics? Thanks for the help.