So, I have my original flock, which are 18 months (9 of them) and new babies (6 of them this morning!) which were introduced in August of 2014 (8 months old). They have been sharing space ever since. I came home to a dead baby guinea today. They are cooped all together at night with the door shut (coop is about 10x8) and red light on. During the daylight hours, I open up their coop door into a new enclosed bird run (16x14). They have plenty of room to roam and often fly up into the trusses. I noticed one of the older guineas had blood on his legs...then I noticed the blood in the coop. I'm not sure exactly what happened but based on the evidence, I would say there was some sort of fight between the 2 guineas. No blood found on the dead baby though. This was my reason for investing in the new bird run...to keep them protected from winter weather in NY and to give them room to roam and fly some. I am shocked that this happened. I know the younger birds don't like to go in the coop at night. I usually have to heard them in...but they eventually go. I believe its a male that was killed....one of the pied's. Has anyone had something like this happen? Just wondering if I should separate them out again. They have been cooped up for about a month due to snow on the ground. Maybe they are becoming aggressive from being confined. I hate to lose any others as I hatch and sell the keets. Any thoughts?