Last night we lost one of our Polish pullets (almost a year old) to something strange...she was found barely able to sit up, not moving, feet freezing. She died within hours of us finding her after being brought in to the heat. Now, after being fine all morning, 2 more of the Polish gang are acting up - one another pullet and one our big roo (which almost rules out my original thoughts about him attacking her). Any ideas?? The other 2 pullets are acting fine, but so was everyone else up until yesterday. They have not been introduced to anything or anyone new. Help!!