How old does a Mandarin hen have to be lay eggs? I have two pairs of Mandarins that I purchased earlier in the year. One is paired with an older male. I think they will be a year old sometime in the summer. I built them some nesting boxes anjd put them in their pen today. I am hoping to get some babies this year. the hens are pinioned I believe or wings clipped as they cannot fly just jump up (not my doing) They are in a pen with a pair of amherst pheasants.