We can't have happiness if we cause others unhappiness.

Be clear in your mind what you want the outcome of your communication to achieve. If your aim is more than just to vent your anger towards a meat eater and you sincerely want that person to be a kinder more compassionate being, then you must start by seeing them as a kind and compassionate person. If you are unable to see them as kind and compassionate, then how dare you demand them to see themselves that way.

You cannot do yoga. Yoga is your natural state. What you can do are yoga exercises, which may reveal to you where you are resisting your natural state.

Some people may argue that if the animals are treated humanely prior to being slaughtered, this justifies their confinement and slaughter. Is it ethical to rob beings of their freedom but give them a comfortable prison and provide them with food until they become fat enough to be slaughtered? Any way you look at it, farms are places where animals are kept in preparation to be slaughtered and ultimately eaten as food.

The fact is that eating meat and dairy is bad for your health, the health of the animals eaten, as well as the health of the planet.

As humans, we do get to choose what we eat, and when we choose to eat a plant, we are eating (i.e., harming) just that plant, plus indirectly whatever nutrients that plant consumed over its lifetime (and we are also harming whatever beings may have been living on that plant or who were injured or killed in the harvesting process). But when we eat an animal, we are eating not just that animal, but also indirectly all of the plants and other beings that that animal ate over its lifetime - those plants became the flesh that we eat.

To live and breathe with an exclusive focus on one's small self, disconnected from the whole, is the definition of egotism.