If the week old baby peafowl are white and are from the same batch, you can include size in differential.
obviously if they are white you can't tell by color. There are many ways to tell by color, I think two very good ones have been mentioned here.
Telling males from females is much easier if you are looking at a good sized hatching, say at least five. Even better if it is looking at the chicks of several pair at a time. Then it is easier to put males and females together. It also helps to know if any had difficulty hatching, don't include them in the differential.
B4, when you say there is no way to tell whites at that young, please speak for yourself. I presumed I was talking to an intelligent lady here. She had enough smarts to come ask you guys for your input
I had to readback, and she did not mention white peachicks. But it is my experience with peafowl and other fowl, that we can look a look closer than we have been looking, and without harming the chick in the process. This and the fact that I have been right 98percent when guessing gender, leaves me wanting to stick to my guns. I would invite you to put me to the test. I haven't kept files to present to you. Actually I have only raised 150 fowl, so my rate could go down. But I expect experience to teach me more... Like don't give away the cat with the farm to cast in the mold kinda peops. Telling all one knows in five minutes means one doesn't know much anyway.
Thank you for taking me to task, I have learned a lot from this interaction. Sorry I couldn't be more specific about the reasons for my confidence in guessing gender in early peachicks. I failed there.
Deerman, thanks for the info on peafowl and children. I guess the ones who are raised by hand wouldn't be as shy about coming right up to a child and therefore putting thier two faces in range for a curious peck. I will keep what you say on my mental shelf and see what I can learn.
Now, If I have said anything else stupid here, I reserve the right to take it back...

grinning and bearing it.
Sincerely,
MarlaKaye
MarlaKaye