This issue is close to my heart. Through the Bible animals suffer as a direct effect of man's sin. God's original plan;
Genesis 1:29 And God said, Behold, I have given you every herb bearing seed, which is upon the face of all the earth, and every tree, in the which is the fruit of a tree yielding seed; to you it shall be for meat.
Man was allowed to eat meat but we really don't know why. There are theories; that man would not live as long as he was pre flood, and others. It came with a curse;
Genesis 9:2 And the fear of you and the dread of you shall be upon every beast of the earth, and upon every fowl of the air, upon all that moveth upon the earth, and upon all the fishes of the sea; into your hand are they delivered.
Israels stubborn rebellion against God causes suffering to animals and God show's His concern through the prophet;
Jeremiah 12:4 How long shall the land mourn, and the herbs of the whole country wither? for the wickedness of those who dwell therein, the animals are consumed, and the birds; because they said, He shall not see our latter end.
Hosea's beautiful dipiction of God's love for us includes animals in the eternal covenant;
Hosea 2:18 In that day I will make a covenant for them with the animals of the field, And with the birds of the sky, And with the creeping things of the ground. I will break the bow, the sword, and the battle out of the land, And will make them lie down safely.
This was the result again of Israels sin;
Joel 1:18 How the animals groan! The herds of cattle are perplexed, because they have no pasture. Yes, the flocks of sheep are made desolate.
The wages of man's sin runs deep and nothing has changed in thousands of years, it only gets worse. Now we have millions of animals suffering from birth to slaughter to feed man's insatiable desire for flesh.