I have had these Buffs since they were about a week old, born at Easter. They were hatched from a friend's eggs at her house. They have been healthy and thriving... until recently. I have a mixed flock that free ranges. I lost a girl Buff and thought it was worms. So I dewormed them with Wazine and then did Safeguard 10 days later. Within those 10 days I lost another girl with a bad crossbeak. She was tiny but surviving so I let her be. Today I lost a rooster (3 days after the Safequard). The only sign I can see is one wing hanging lower than the other while walking and I only noticed this with the rooster. The girls are just smallish. The next day they are lying on the run floor, trampled by the other chickens. I have one rooster and two girls of the Buff's left, out of 7. The girls look big and healthy. The other rooster looks like his wing might be hanging lower. No other signs. I thought for sure worms. I am at a loss. Any ideas? TIA.