JS speaks on the salvation of beasts.
Manuscript History of the Church, volume D-1, The Joseph Smith Papers website, accessed March 23, 2021
But John saw the actual beast in heaven, showing to John that beasts did actually exist there and not to represent figures of things on the earth. When the prophets speak of seeing beasts in their visions, they mean that they saw the images; they being types to represent certain things. At the same time, they received the interpretation as to what those images or types were designed to represent. I make this broad declaration that whenever God gives a vision of an image, or beast, or figure or any kind, he always holds himself responsible to give a revelation or interpretation of the meaning thereof, otherwise we are not responsible or accountable for our belief in it. Don’t be afraid of being damned for not knowing the meaning of a vision or figure if God has not given a revelation or interpretation on the subject. John saw curious looking beasts in heaven— he saw every creature that was in heaven,— all the beasts, fowls, and fish in heaven,— actually there giving glory to God. How do you prove it? See Rev. ch 5. v 13. ‘And every creature which is in heaven, and on earth, and under the earth, and such as are in the sea, and all that are in them, heard I saying, Blessing, and honor, and glory, and power be unto him that sitteth upon the throne, and unto the Lamb, for ever and ever? I suppose John saw beings there of a thousand forms that had been saved from ten thousand times ten thousand earths like this;— strange beasts of which we have no conception— all might be seen in heaven. The grand secret was to show John what there was in heaven: John learned that God glorified himself by saving all that his hands had made, whether beasts, fowl, fishes, or men, and he will gratify himself with them. 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. ¶