The righteous care for the needs of their animals,
but the kindest acts of the wicked are cruel.
This is a really interesting Proverb. Animals are rarely used in context with theology or God. The question is, "Why did this verse make the Bible?" I think it points out several key thoughts about God.
1). He cares about the smallest needs and in our world animals at some level represent those needs. We serve a very loving God and if we want to mimic him than we too must show love
2). This verse probably has some implications as to how God wants us to view his creation. Perhaps Christians spend too much time thinking of ourselves as having "rights" in God's creation and too little time thinking of ourselves as being charged with "taking care of God's creation."