Please help...we've got 36 (35 as of about 20 minutes ago) broilers and 22 layers in separate brooders. These birds are 3.5 weeks old and have been bedded on pine shavings since they were one day old. We went to change the bedding tonight and didn't have enough pine shavings so we used a mixture of old straw and hay (probably 15 years old). The birds went nuts! They were clucking and gathering in one corner of the brooders. I told my wife that it was just a new feel under their feet and they would get used to it but an hour later they were still in the corners and were not happy...clucking and carrying on and one broiler was dead. Can anyone shed any light on this? I didn't realize that old straw could be a problem. Any input is greatly appreciated. Thanks.