There are many reasons (spiritual, health, weight loss, allergies, environmental, ethical, etc.) to stop eating animal products, and this can be a long process. The more you learn about the topic, the more you will find that your diet changes as well. Here is a list of the most common types of transitional diets and meat-free diets. Transitional diets Flexitarian : May choose not to eat meat, fish, poultry, dairy, or eggs. But sometimes might eat any of those. Pescatarian : C