John 10:14 I am the good shepherd, and I know mine and mine know me,
15 just as the Father knows me and I know the Father; and I will lay down my life for the sheep…
Christ is the Good Shepherd
At the time this was written, it referred to the Jewish followers of Christ. Today it can refer to Catholics.
…16 I have other sheep that do not belong to this fold. These also I must lead, and they will hear my voice, and there will be one flock, one shepherd.
Again, at the time it was written, it referred to the gentile who were to sone become followers of Christ. Today it can refer to Non-Catholic Christians or soon to be Christians. When Christ comes again, we will all be one flock.