4 year old Rhode Island White just died

[boondockkid]

Went out tonight to feed my chickens some scraps and saw one just laying in the run. It was clear she was dead before I made it over there. I checked to see if there were any injuries and there were none. Is 4 years old an age where they can just literally drop dead? The other five chickens seem to be doing and acting just fine.

 

[Poultry parent]

They can die of heart failure. If you're very concerned about it you can do a necropsy