I'm so sorry. That's very sad to hear and it must be so difficult for you.
I'm definitely not the best person to advise. I've had peafowl for 5 years but I've never had any health issues with them until this year so I'm really a beginner with these things. I do know for sure that the best...
Has she been eating well up until today? Is she drinking? Are you able to bring her inside to somewhere warm and check her over a bit more and weigh her etc? Do you have a vet or are you hoping to treat her yourself? If yourself, you should probably start researching how to tube fluids and crop...