On Suffering and Happiness

Is happiness something we should seek? I feel discontent seeking the state of happiness or creating this state of mind when I know that other beings are suffering. For example, if one knows that animals are being slaughtered inhumanely to satisfy the desire of greed and glutony, then how can one conciously feel happy with this in one's mind? I cannot simply ignore this. There are many examples of these bad acts in many forms. What is the right mindfullness and how should I perceive these bad acts as a buddhist?