My mate lost a yearling the other day(died) that had the exact symptoms of the bird at the start of this topic. It only lasted 24hrs from the first signs to death. Since then we have another 4 yearlings between us that are starting to show similar signs. Not responding to feed whistle,sitting puffed up,watery faeces,in general just not themselves. They are in with young birds but none of the young uns of this year are looking off. Any ideas anyone?