Namaste,
I would like to share what I have learned about vegetarianism/non-vegetarianism.
When you are crossing the street and all of a sudden you see a bus coming from the corner of your eye, your brain pumps adrenaline into your system to give you super strength because the body is in a state of danger. This is very much needed for life threatening situations, because you can do super-human things to escape death, but if the adrenaline is constantly in your system, you will wear you body down (this is what happens when you stress out too much also).
When you kill an animal, the same thing happens. There is adrenaline pumped into its system once the animals's body detects that it is in a life-threatening situation. Afterwards, even though you cook the meat, some of the adrenaline actually still stays there and our bodies digest that adrenaline. This might be a very small amount, but it is still there.
In today's industrial animal farms, some animals are given shock treatment to the brain and killed in milliseconds in order to minimize the release of these emergency hormones (and plus there are laws for killing animals with least amount of suffering). But what is missed here is that those animals, they live their whole lives in a very crowded/intoxicated environment, so they are constantly in a state of danger/torture. The chickens are stuffed together and have their beaks and toe claws cut off so they don't fight with each other. They spend their whole life in an "emergency" situation, therefore their bodies are excessively producing huge amounts of adrenaline. I am not being judgmental about the industrial farming, I will let you decide that for yourself. I am just saying what happens to the state of the animal's bodies.
Also, in today's industrial animal farms, the animals are fed with medicines to make them not sick and with growth hormones so they grow more quickly. Some of these hormones and medicines also stay in the body of the animal and are consumed by the human digestive system. (the over-weight of a lot of people in today's world is partly because of digesting of these growth hormones from the meat of the animal).
If you are trying to make a decision whether to be vegetarian or non-vegetarian I hope what I have written will help you. Also, if you choose to become a vegetarian, do it slowly and make sure you do research about which items will constitute a complete diet.
Take care and be well,
Svarupa