It was not until after the flood that man was given animals to eat. Chapter on says they were given fruit to eat.
Genesis 1:29Then God said, “Behold, I have given you every seed-bearing plant on the face of all the earth, and every tree whose fruit contains seed. They will be yours for food. 30And to every beast of the earth and every bird of the air and every creature that crawls upon the earth—everything that has the breath of life in it—I have given every green plant for food.” And it was so.
Genesis 1:29Then God said, “Behold, I have given you every seed-bearing plant on the face of all the earth, and every tree whose fruit contains seed. They will be yours for food. 30And to every beast of the earth and every bird of the air and every creature that crawls upon the earth—everything that has the breath of life in it—I have given every green plant for food.” And it was so.