“Says one, ‘I cannot believe in the salvation of beasts.’ Any man who would tell you that this could not be, would tell you that the revelations are not true. John heard the words of the beasts giving glory to God, and understood them. God who made the beasts could understand every language spoken by them. The four beasts were four of the most noble animals that had filled the measure of their creation, and had been saved from other worlds, because they were perfect: they were like angels in their sphere. We are not told where they came from, and I do not know; but they were seen and heard by John praising and glorifying God.”
| Teachings of the Prophet Joseph Smith, p. 291, 292