[northfifeduckling]

only done it once a few years ago and then I only trusted my skill when she stated laying  at what age is it reliable, when do  tailfeathers, voice, etc.show 

[jaykay]

My drakes definitely had curly tails at 14 weeks or so - can't remember if it was any earlier.

Dad seems to be able to hold them to 'talk in his ear' at just a few weeks old and hear the difference - I can't!