Sudden death of a guinea

[dinabean]

I have one Guinea in with my chickens. He was fine. No signs of a problem then on Sunday he was sitting in the coop (I thought maybe he was a she and was laying.). Then he did have a discharge from his beak late afternoon and died by evening. What could cause this? None of my other chickens are sick

 

[M-H-Fielding]

I have one Guinea in with my chickens. He was fine. No signs of a problem then on Sunday he was sitting in the coop (I thought maybe he was a she and was laying.). Then he did have a discharge from his beak late afternoon and died by evening. What could cause this? None of my other chickens are sick

I'm sorry for your loss!
Was he injured at all?