The Daily Mail is currently carrying a report on their front page on the fate of hundreds of thousands of chicks that go on to provide the cheap chicken you see in your favourite supermarket.
I am not a vegetarian, but I refuse to eat meat from animals that have not been allowed to live as they naturally would wish to do. Read the article and weep.
If you keep chickens, you will know that they have intelligence, can recognise individual humans, can learn things, and have quite different tastes in food. What they like to do most, is spend all day pottering about and scratching the ground and occasionally, lay an egg. Some will even come up for a cuddle.
Sorry, but it breaks me up to think that humans can be so cruel to another species, especially since it is entirely unecessary. If we all just paid a bit more for our eggs and refused to eat factory chicken or eggs, these companies would cease to exist.