I was recently told that I should start doing bird boy blinds and sight blinds at a recent training session with some friends. I was briefly explained about what each of these were, but I don't completely understand them. Can someone explain to me what the distance/criteria should be when training on these? For instance, what distance would be a good starting distance and completion distance for bb blinds? How tight of a line should the dog carry to the blind? Should I handle on the blind or call back and resend? What should the distance be between blinds? On sight blinds, what distance, how tight of a line, and should I use new locations for the sight blinds or can I use the same blind point but a different starting point.