I've only had chicks die of no apparent cause. I have about 10 chickens his age and I had kept a rooster and gotten rid of the rest. I kept the 2 silkies since a few weeks ago I still wasn't sure. Last week one started crowing. It didn't seem to be a problem with the other rooster. He is a sebright bantam- small but he is assertive as the leader. I hadn't seen them fight. I went outside and the male white Silkie was freshly dead, still warm and not stiff. I had just fed them raspberries earlier but they can have those right? I might not ever know but I didn't see any blood or markings of a fight. Could he of had a heart attack? Should I inspect anything to make sure there isn't a disease or give my current chickens anything just incase? Thanks for your help!