There is no doubt that animals will be in Heaven. The Bible is clear:
“Now I saw Heaven opened, and behold a white horse…”
The Bible describes the angels around God’s throne as having features and characteristics like that of a lion, a bull and an eagle (Ezekiel 1). God Himself is likened in Scripture to a lion, a leopard, a bear (Hosea 13:7-8) and to an eagle (Deuteronomy 32:11). God made a good and perfect earth, populated by many animals. God directed Adam to name the animals – indicating relationship.
Creation Worships the Creator
The largest book in the Bible, the middle book of the Bible, the Hymn and Prayer book of the Bible, the Psalms, reveal that all of God’s Creation have contact with God (Psalm 93). All God’s Creatures praise Him.
“Praise the Lord from the earth, you great sea creatures… beasts and all cattle; creeping things and flying fowl; …let them praise the Name of the Lord for His Name alone is exalted. His Glory is above earth and heaven.”
“Let everything that has breath praise the Lord.”
The living creatures around God’s throne who are singing Holy! Holy! Holy! is the Lord of Hosts; the whole earth is full of His Glory! are animals (Isaiah 6:3).