The answer
There is no support in the Holy Scripture nor in any of the Holy Tradition nor in the writings of any of the Church Fathers regarding the eternal life of animals. In the account of creation, the Book of Genesis reveals that all animals, whether in the sea, upon the earth, or in the air, were all created before mankind, among the creation of vegetation and the solar system. We understand this to be part of God's economy to furnish the earth for the sustenance of man. From creation until the Second Coming of the Lord Jesus Christ, animals provide an efficient ecology and bear many burdens for the use of man.Answered by His Eminence Metropolitan Youssef (opens in a new tab)