You are a guide. You are a hunter.  By proclaiming that "at two years "cubs" are on their own," you've foolishly interjected yourself into a realm of scientific field research that is far beyond your perceived opinion.  You can guide and you can hunt and you can opine, but leave the facts to those who can support and reinforce them with more than a flippant phrase.  The scientific community, animal behaviorists, wildlife statisticians, data collectors and their years of reasoned research would be most appreciative of your cooperation.