A few things come to mind...
Did you recently open a new bag of feed? Have your birds ever been tested for mycoplasmosis? (They can have it and symptoms show when they get stressed - cold weather, etc...) What does the poop look like? Are you running a water heater? I ask the last because I lost a few birds early this fall and was stumped and worried. One night when I was getting them water, I moved the fount to fill it and the heated base was buzzing. I am wondering if they may have been getting low levels of shock that was enough to kill them without frying them. After I took the heater out, I lost one more bird, then the rest seem to be fine.
I really don't like mysteries like that!
Did you recently open a new bag of feed? Have your birds ever been tested for mycoplasmosis? (They can have it and symptoms show when they get stressed - cold weather, etc...) What does the poop look like? Are you running a water heater? I ask the last because I lost a few birds early this fall and was stumped and worried. One night when I was getting them water, I moved the fount to fill it and the heated base was buzzing. I am wondering if they may have been getting low levels of shock that was enough to kill them without frying them. After I took the heater out, I lost one more bird, then the rest seem to be fine.
I really don't like mysteries like that!