Where is the verse in the Bible that makes reference to animals having teeth before the fall?
Once again you are making claims without actually doing any of the work of establishing any facts for what you rail about. What does the Bible actually SAY about before the fall? That is the place to start. You keep starting with wild accusations and demanding that people explain your imagination away.
Here is scripture on creation before the fall:
And God said, “Look—I am giving to you every plant that bears seed which is on the face of the whole earth, and every kind of tree that bears fruit. They shall be yours as food.”
And to every kind of animal of the earth and to every bird of heaven, and to everything that moves upon the earth in which there is life I am giving every green plant as food.” And it was so.
Genesis 1:29-30 LEB
So presumably animals ate before the fall because God gave them food before the fall. Unless perhaps they didn't eat their food that God gave them, they just sat around without teeth and without digestive tracks, waiting for Adam and Eve to eat first so that they could hyper evolve digestive tracks before eating.
This leads us to more questions about how some believe that death of plants and bacteria and insects were ok, just not death of animals for whatever reason. As if rotting and decaying vegetation is somehow a good thing.
Interestingly, Genesis also refers to cultivation of the land, which also tends to require substrate biomes, things like annelids and insects digesting leftover crops to make way for next year's planting. This has lead some to wonder if Adam and Eve were actually created during a more modern time of agriculture, recently in history, after mankind had already constructed civilizations. And after all, Cain was afraid of someone when he was exiled to the land of Nod, where he then went on to meet his wife (though scripture says nothing about Adam and Eve having more children before hand, so it seems unreasonable to conclude incest) also supporting the suggestion that other people pre existed Adam and Eve outside of the garden.
And Yahweh God took the man and set him in the garden of Eden to cultivate it and to keep it.
Genesis 2:15 LEB
Look, you have driven me out today from the face of the ground, and from your face I must hide. I will be a wanderer and a fugitive on the earth, and it will happen that whoever finds me will kill me.”
Genesis 4:14 LEB
There are a few other interesting body parts that animals would presumably be missing if they could not eat. One would have to wonder, if they had mouths and saliva, if they would ever swallow their saliva, where would it go?
All weird questions when we think about scripture in a modern scientific sense. It's much easier, in my opinion, to go with the ancient near-east, pre-scientific view of scripture. Then all these scriptural conflicts go away.