I just fed my chickens oyster shells this morning with their feed for the first time. When I went to feed up tonight, my favorite little silkie roo was standing by himself and would not eat when I came to fed. He was wet from the rain that we are currently getting from Fay. then I noticed his crow had hard rocks in it as I am assuming it is the oyster shells I fed this morning.. I brought him in the house and put him in a pet taxi with a light on him to warm him up..... What do I do now????