Yeah, I have seen the animal bleed out once, and it is hard to watch.
A small and young lamb is all tied up laying on the ground with the carotid severed. It is clearly in fear and tries very hard to get away. That struggle lasted for a long time until it eventually is exhausted and died.
I am not sure if this is how halal and kosher meat are produced though.
I think lemmynsfw is one of tge largest lemmy instance.