Friendship and loyalty: two values that people with four-legged friends are truly familiar with. What a joy to find them waiting for us when we get home after work! When we look into their eyes, we can see how much they have missed us. Their enthusiasm and affection are truly uncontainable and we can see an unwavering certainty in their eyes: they will never let us down. It is no coincidence that one of the most commonly used expressions to refer to pets is "man's best friend".