Denny's JV Roosters are cockerels (not sure if it's spelled right), which is a rooster under a year old. The feather barbs aren't as stiff as a mature rooster, and are stiffer than hen or game bird hackles. They were often subbed for hen and game bird hackle for flies that were going to be used in faster flowing water, jus as CM Stewart mentioned. They are also a good choice for dressing dry flies, though they may require to be dried more often or have floatant applied more often.

They are a great score for the fly dresser.