My 6 year old Buff Orpington (Liza Jane) was dead in the coop Sunday morning. She had been fine except for about a week would fall over a couple times a day and not be able to get up for about 30 seconds to a minute. Was eating fine, comb was red. We thought it was maybe an injury to her leg but could not find anything. Any thoughts anyone? I'm now worried it was some kind of contageous disease or something. I only have 3 other hens, same breed, one also 6 years old, two are 4 years old.