Yes, it alters the flavor of the meat.....it seems to remove any of the taste of the barnyard from the smell and the taste of the meat. It clarifies the taste so that all you smell is meaty goodness and the flavor is the nutty, sweet flavor of meat and no after notes of corn/feed/manure. It makes for the most flavorful broth and also the silkiest and most flavorful rendered fat I've ever had in all my years of eating farm grown birds. I'd never go back to feeding the old way for various reasons, but the flavor of the eggs, meat, fat and broth is a huge incentive!
Yes, I'd eat a bird that's been put down due to injury....ALL animals are stressed before they die, as the body will go into a fight or flight reaction to blood loss and this sends adrenaline racing throughout the body, signaling it to MOVE(you'll see this in the flapping, kicking, convulsing of the body), sends the heart racing to fill blood volume to the blood vessels, increasing respiration to get more O2 to the tissues, etc.
The best way to avoid getting emotional about it is to view it much like putting up vegetables out of the garden. They all must be sliced up and processed in order to turn them into food for the body and so do the animals. If you can use a clinical eye while doing so, you will learn more about chickens than you ever will from books....examine all the body parts, compare them to other bird's parts, look at their position in the body, note color, texture, etc . If you can look on it as work and learning instead of the more emotional aspect of it, soon you can train yourself to approach it in that manner...it's just a dirty job that someone has to do in order for you to eat. Might as well be you.
I wish you well for your food production!!!
Bless you this day and all the days to come!