Love to hear it
Sure.
Biblically, the first Creation was “very good”. And when God Himself describes something as “very good”, you know there’s nothing violent or jarring to the senses in it at all. All creatures were herbivores, and there was not even any death.
Sin entered the world, and all of Creation was cursed. Death, disease, predation, thorns (and sharp teeth) were part of the curse.
If the plants previously had no thorns and had them following the cursing of Creation, it’s not a stretch to think that animals did not have killing/meat eating teeth prior to the curse, either.
The teeth conjecture is just that - conjecture on my part, because I nor anyone else was there that wrote about it, and only the thorns were specifically mentioned in the Biblical account.
Now, this theory of mine is based on the presupposition of the truth and inspiration of the Bible.
If your presuppositional worldview varies from this, the theory will make no sense.
But, the important thing in any conversation of this type is to recognize that you, as well as I, interpret what we see through the lens of our presuppositions.