Observe the dietary commands in Gen 1, as thus…
And God created the man in His own image; in the image of God He created him. He created them male and female. And God blessed them; and God said to them, Be fruitful and multiply, and fill the earth, and subdue it, and rule over the fish of the seas, and over birds of the heavens, and over all beasts creeping on the earth. And God said, Behold, I have given you every plant seeding seed which is on the face of all the earth, and every tree in which is the fruit of a tree seeding seed; it shall be food for you.And to every beast of the earth, and to all birds of the heavens, and to every creeper on the earth which has in it a living soul, every green plant is for food. And it was so.(Gen 1.27 – 30)
In Gen 9, the dietary commands are altered, as thus…
And God blessed Noah and his sons. And He said to them, Be fruitful and multiply, and fill the earth. And your fear and your dread shall be on all the animals of the earth, and on every bird of the heavens, on all that moves on the earth, and on all the fish of the sea. They are given into your hands. Every creeping thing which is alive shall be food for you. I have given you all things, even as the green plant. (Gen 9.1 – 3)
Clearly, after the flood, we can see that the diet for humanity changed to include both plants and animals.
But…where is the command for animal’s diet to change?
We know that we have carnivorous animals living today.
What gives?
The command to make a change doesn’t exist, for the simple fact that it didn’t need to be changed, as carnivorous animals existed from their creation, in addition to plant eating ones.