You may be right. I have the rest of the birds in the chickens room inside the house now. This is very sadI'm so sad about this, so sorry,it is heartbreaking, and confounding.
OK now I'm suspecting foul play. What about your evil neighbor(s) - could they have put antifreeeze into their water or puddles? Your yard has been perfectly safe for ages, that she got into something there suddenly doesn't make sense.
