Personally, I happen to like my Peacocks and care about them. I would not be caught dead showing them in a venue that insists they be restrained in a manner that can be mortally dangerous for them. These kind of "shows" are the reason the ASPCA came into being. Tethering is not safe, you have a dead peacock that proves this, if they will not take that into consideration and allow a harness, you should just walk away, because it is proof that they do not have any interest in learning about Peafowl. If ,on the other hand you are only interested in showing off your "Cool" bird and maybe getting a ribbon, by all means....tether away!