We have two chickens that are about 6-7 weeks old. We have them is their own run, separated from the other chickens we have until they get a little bigger. This morning they were both fine, everything looked normal. When we came home from work, one of the young chickens was laying on their side, breathing rapidly and looked soaking wet like they had been out in the rain. The other chicken was normal (and dry). We have brought it in and wrapped it in a towel to get in warm and dry but I am pretty sure this chicken will not make it another hour. Any ideas? We have no idea what could have made it so sick so quickly. Thanks.