Yes, one should surely put the rings on to your birds to keep the accurate record of your stock.
It seldom happen that ring cause injury to the bird’s leg.
For the future identification of a season’s young birds, rings with the year stamped on them are necessary for gauging the age of a bird at a quick glance. Rings are available through LSP, rings are ‘year’ rings with a different colour allocated each.
Moreover, to participate in the LSP shows participants birds must have LSP rings on.