I am feeding a few #800 out and one has an eye that is almost swollen shut. It also has diarrhea and is coughing. Does anyone know what would cause these at the same time. They are being fed free choice hay, and #8 corn a day. They also have been eating some older hay that was going to be beading. There are also a few places they scratch that have some nails(they just keep finding them). Any ideas/ would pink eye have the cough diarrhea?