Ok any ideas what OM, OF, YM, YF mean?

[call ducks]

I am filling out the form to send in for a local show, and i am puzzled as to what OM,OF,YM,YF mean any ideas?

I am taking my Appleyard pair, cochin trio

 

[Year of the Rooster]

Old Male, Old Female, Young Male, Young Female?

 

[call ducks]

Quote:
Ok Cool this is my first show form i have filled out... was confused but that makes sense.

 

[Year of the Rooster]

That's all I could think of... I honestly don't know