The Good Shepherd upholds and faithfully practices the doctrine of “Closed Communion.”
From the LCMS website
The LCMS believes Scripture teaches the Lord’s Supper is a precious gift of God in which Christ gives us His true body and blood (in a miraculous way), together with the bread and wine, for the forgiveness of our sins and the strengthening of our faith.
Because the Bible teaches that this Sacrament may also be spiritually harmful if misused, and that participation in the Lord’s Supper is an act of confession of faith, the LCMS ordinarily communes only those who have been instructed in the teachings of our church and who have confessed their faith in these teachings.