When do White Chinese Geese get their Knob

[bravevline]

On top of the beak? What age?

 

[8GeeseALaying]

One of mine is 6 wks old and is starting to show a small start of a knob. Makes me think it might be a gander being this young. I have both colors of chinese, adults and babies but this is my first year raising the babies.