Free: Contests & Raffles.
There are a unregulated # of tags out there by certain tribes, I think I know which tribe you are talking about. I also know who was the cooperative partner doing the study with WWU. I will look into how many goats were taken if they give up the info (a coin flip at best). I still am wondering about the 8-10 and now a claim that that's on the conservative side. .. I will do some digging but like I said before and your first hand knowledge(the mountain rescue), goat country is for a select few. I am still not even doubting you claim, it's just a significant number when speaking of a highly volatile population in the area of 450 +/-.