Thanks for writing.
The Bible makes no distinction between the soul and spirit of any animal or human, which to our understanding means that they are immortal. The only difference is that human beings were also created in the image of God, but the Bible also tells us that many of them will go hell. It just means that humans were given the ability to compassionately care for God's creation.
So as far as we're concerned, if humans go to heaven, then so do animals.
In the Love of the Lord,
Frank and Mary