One also has this to contend with--from Genesis 1:28
God blessed them. God said to them, "Be fruitful, multiply, fill the earth, and subdue it. Have dominion over the fish of the sea, over the birds of the sky, and over every living thing that moves on the earth."
One can interpret this to mean man can do what he wants to with the animals on earth. God put them here as our plaything, and to eat.
