Romans 8:21 reads:
that the creation itself also will be set free from its slavery to corruption into the freedom of the glory of the children of God. (NASB)
The word corruption (φθορὰ) as used by Paul seems to at least include the idea of bodily decay and death, as is evidenced by his use of the word in 1 Corinthians 15:42:
So will it be with the resurrection of the dead. The body that is sown is perishable (φθορὰ), it is raised imperishable; (NASB)
Since all creation is to be freed from slavery to corruption, does this not imply that all animal life will be free from death and enjoy eternal life?
Plant life was given as food to animals in Genesis 1, and thus was not intended to have eternal life. However, are there scriptural indications that not only humankind, but animals as well are to enjoy eternity?