My hen had sour crop which I discovered on a Sunday afternoon. Afer reading these posts I went to the store and bought Monistat. She was worse on Monday. I rushed her to the vet when I got home that evening and she couldn't even hold her head up. The vet gave her all sorts of fluids and medicines. The vet told me that the Monistat contains propylene glycol which is toxic to birds. My hen died this morning at the vet. My other hen is showing similar symptoms and the vet told me to NOT give her Monistat, but to bring her in immediately. I followed the advice of people on here regarding Monistat and my bird is dead. People need to know this is not a cure, it is a way to kill them. Always call a vet before giving your bird any medicine. If I had, my bird might still be alive.