I read this very good book called "Some We Love, Some We Hate, Some We Eat: Why It's So Hard to Think Straight About Animals". In the book it questions our take on animals. It talks about the morals and ideals we place on animals. I highly recommended it if your a animal lover.

In one chapter asks why the rats in a lab are important the worker but when they escape they become pests that should be killed?

A good read.

that does sound good, once I finish spending money on domain names and writing books, I shall look for it. xD