Other sheep is speaking of the Gentiles, which were once not part of the fold in Israel. They are now gathered in through faith in Jesus.
God’s sheep are the people of Israel. The other sheep are the gentiles. We’ve been grafted in through Christ.
Romans 11 :20-23 (KJV)
20 Well; because of unbelief they were broken off, and thou standest by faith. Be not highminded, but fear:
21 For if God spared not the natural branches, take heed lest...
Although we may have been cut off from God, God will bring us back to Him if we repent and call upon the name of Jesus.
Romans 11 :9-12 (KJV)
9 And David saith, Let their table be made a snare, and a trap, and a stumblingblock, and a recompence unto them:
10 Let their eyes be darkened, that they may...
It is because the eyes of the Israelite people are darkened is “that they may not see”. In this, do they walk contrary to God and not even realize it.
