I just had a hen die this morning. No attack marks, it was warm last night, no jammed egg as far as I could tell. Any other ideas???
I changed the water out with molasses water mix & dropped them yogurt.
Everyone I know has this happen at one time or another, and it is often an unknown heart defect. For those brave enough to do necropsy, especially those who have already processed several birds, differences are detectable which offer clues. To be honest I don't remember what they are, I have yet to process or necropsy my birds. Preumably they would be signs of loss of blood flow - a stroke or heart attack is usually caused by a blood clot or blockage stopping blood flow in the heart causing death of the muscle tissue of the heart. There can also be faulty valves causing the heart to work harder than normal, abbreviating the life of the bird much as it would in a human if undiagnosed.