I have been trying to get some of my Sunday School members to understand the fact that when God remakes the Earth in the Book of Revelation, there is no great rapture of Blue Whales, or polar bears, or dogs, or kittens or anything else. It all gets burned up. That is why we are told not to put our faith in things on earth. They are all going away.
Only one thing that man made which will be in Heaven.
The holes in Jesus’ hands, feet and sides. That will be the only work of “man” in Eternity.
Keep in mind that the Millennial Kingdom will be populated with animals (for example - Isaiah 11:1-10), and I suspect the same will be true in the new heavens and the new earth as well (Revelation 21-22)since they are trees and water mentioned. I think Christians also need to be wary of a Greek view of heaven that places us on floating clouds in the sky playing our harpsicords forever. Heaven will be a very robust busy place, full of nations, commerce, trade, and I believe animals too.