Clearwater Chicken
Songster
I also believe that since it is not commonly kept by people they might not regulate them.Based on how difficult it is to find anything online concerning the Sate of Washington's laws regarding the possession of live game birds, my recommendation is to call your local game warden or DNR agent. That person should be able to put you in contact with someone that can provide an answer. I would not be surprised if Washington does not permit the possession of live ruffed grouse and therefore would not have a permit that allows such possession.