I am with Amiga and KuntryGirl: Something toxic, but possibly not feed...it could be environmental.
What about your bedding? I had some moldy straw kill two geese and sicken a third earlier this year. The straw didn't look or smell funny when I put it in the coop. I always wear gloves and what I didn't know was that their was a fine powdery substance on some of the straw, which I found as I was putting clean straw in the "hospital cage" for goose #3. I promptly removed all the bedding and sprayed the coops and hospital cage with Oxine, let them dry and put in fresh bedding (our horse's good hay), the illness stopped.
The offending bale of straw was new from the store. What didn't occur to me at the time was that our entire area was suffering from the worst drought in years, which can cause tons of different molds and fungi to form on plants where they aren't normally found. When your birds inhale these they very quickly begin developing neurological symptoms, such as shaking and walking as if they were drunk and sudden death.
Good luck. I would begin eliminating and replacing the food, then the bedding and cleaning the premises. Do one at a time, so you have some idea what is causing this and can avoid a repeat in the future.
What about your bedding? I had some moldy straw kill two geese and sicken a third earlier this year. The straw didn't look or smell funny when I put it in the coop. I always wear gloves and what I didn't know was that their was a fine powdery substance on some of the straw, which I found as I was putting clean straw in the "hospital cage" for goose #3. I promptly removed all the bedding and sprayed the coops and hospital cage with Oxine, let them dry and put in fresh bedding (our horse's good hay), the illness stopped.
The offending bale of straw was new from the store. What didn't occur to me at the time was that our entire area was suffering from the worst drought in years, which can cause tons of different molds and fungi to form on plants where they aren't normally found. When your birds inhale these they very quickly begin developing neurological symptoms, such as shaking and walking as if they were drunk and sudden death.
Good luck. I would begin eliminating and replacing the food, then the bedding and cleaning the premises. Do one at a time, so you have some idea what is causing this and can avoid a repeat in the future.