For those do it yourself folks...

[MiniBeesKnees]

The answer to those roosters...

http://www.afn.org/~poultry/capon.htm

 

[A.T. Hagan]

There is quite a good thread about this: https://www.backyardchickens.com/forum/viewtopic.php?id=210041

 

[MiniBeesKnees]

I was mostly joking...but read all of the referenced thread.
It has awesome pictures and great information for those serious about the subject.
I was amazed and came away with some education, and a respect for those who are interested in the procedure.