Cats do not give us too many chances. Abuse a cat's trust twice and you could be history, for cats are much less forgiving than dogs and will often l… - Jeffrey Masson

When I talk to farmers about how they treat the animals on their farms, I come up against a strange fact: while the general public and most research scientists all acknowledge that farm animals suffer, the farmers responsible for them have a tendency to deny it.

Many years ago, when I was merely a vegetarian, I met the great Cesar Chavez, and he said to me: "If you are interested in preventing animal suffering, the first thing you should give up is eggs and milk, because the animals who produce those foods lead the most unhappy lives. You would do better to eat meat and stop eating eggs and dairy products." I was shocked, since I had no intention of eating meat but had never thought of giving up eggs or dairy products. But when I looked into it I realized he was right, and now, years later, after I have studied the matter up close, I know for certain that he was completely correct about the cruel treatment of the animals raised for such products. The advantages of a vegan diet are enormous for our health, for the environment, for the animals themselves.

Animals cry. At least, they vocalise pain or distress, and perhaps call for help. Most people believe, therefore, that animals can be unhappy and also that they have such feelings as happiness, anger and fear. But there is a tremendous gap between the common sense viewpoint and that of official science on this subject. The ordinary layperson readily believes that his dog, her eat, their parrot or horse, feels. They not only believe it but have constant evidence of it before their eyes. All of us have extraordinary stories of animals we know well. Yet, by dint of rigorous training and great efforts of the mind, most modern scientists — especially those who study the behaviour of animals — have succeeded in becoming almost blind to these matters.