Last estimate I saw (Vancouver Aquarium estimate, I think) was the in the Aleutians alone there were some 7000 otters. BC had about 3000 Russia had about 15,000 and I forget the rest. They are really neat critters. Perhaps in BC they are threatened, but I don't think they are endangered.
Oh, yeah... about the Queen's Guard; I think they were under some fire in the 90s about the hats, but they tried all sorts of synthetics and nothing worked for long. I don't see any harm in that either as long as the rest of the bear is used besides the fur. They use black bear and I hardly think black bear have a small population. People tend to feed them (garbage cans, dumps, vegetable gardens, fruit trees, etc).