Hey guys today i found one of my chickens dead under a small porch laying there like she was asleep. When i picked her up i saw a soft red spot under her vent around 1 inch in diameter.I did not mess around with it in fear that it might do something explosive (better be safe). I dispose of the carcass so if it is something it will not spread. Also i had already seen this chicken with a discoloration on her wattle and i have 2 more with the same sympomts. They eat and drink fine but i can't figure out if they lay any eggs since i have 60 chickens. The enviroment is kinda muddy cause we had alot of rains the last 2 weeks and some ponds have formed. Their cop however is nice and dry and they can sleep in 1 foot high wooden beams. What could my 3 chickens have gotten into guys ???