I have had two hens in the past three weeks get weak and just squat on the floor. They let me pick them up and NO they are not egg bound. I thought it was the heat but after bringing them in and cooling them off, within a few minutes them both had the same symptoms. Both started gagging and acting like they couldn't breathe and flopped around the cage till they died. When I picked them up to take them out to dispose them they both leaked liquid out their beaks. Any suggestions? Are they getting into something they shouldn't or is there something else it is that is serious and I should watch them all? I now am down to 22 RIR's. Started with 25 but sent the male to chicken heaven when he started attacking me. PLEASE HELP!!! THANKS!