Re: Removing An "Unwanted" Odor from hackle...
Straight vinegar will eliminate urine smell because the acidity of vinegar reacts to the ammonia found in urine. Then after washing with dish soap; dust with baking soda or Borax to absorb the vinegar smell. I used to do this with my skins when I was doing taxidermy mounts.
Born to Fish...Forced to Work !