I had a flock of about 18 guineas that were about a year or so old. Everyone was healthy as far as I could tell, in good weight, had nice feathers, eating, drinking, walking, being generally bad . Last week I came home to find one dead in the coop with nothing externally to indicate why it was dead, still in good weight and in good physical condition, well despite being dead. I was upset, but animals die and I couldn't figure out anything that would have caused the death that I could change or fix. The next day, same thing, all of them looked fine when I left for work, came home, and one was dead in the coop. I was much more upset by this because two dead guineas in 2 days without any visible cause of death. A few days later, another one died just like the other two. The third one is at the vet for a necropsy, but the results aren't back yet. The guineas are allowed to free range during the day and then they all come back to the coop at night for their treat and to get locked up. We also have geese and they have been acting completely normal and healthy. Does any one have any ideas on what this might be?