I have found chickens dead in their coop the last few days, But The first one I found was about 4 months ago when I found my silkie rooster dead. Then again about 3 weeks ago I found a 6 week old that just died, Then yesterday I found 2 more dead which is about 12 weeks old and found 2 more this morning dead.. And all of these chickens was doing fine the day before. The 2 that I found this morning was vaccinated at the Hatchery which was about 12 weeks old also.. I just don't know what to look for at this point .. I am hoping someone who has had the same problem can help point me in the right direction