There is nothing in the bible that I read that claims nothing ever died prior to the Fall. What are you reading?
Romans 5:12
Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned.
And verse 17:
For if by one man's offence death reigned by one; much more they which receive abundance of grace and of the gift of righteousness shall reign in life by one, Jesus Christ.
1 Corinthians 15:21
For since by man came death, by man came also the resurrection of the dead.