The song being sung by the Kingdom Choir in The Well is titled "Don't Think Twice, It's Alright" by Bob Dylan and was written in 1962 and released on the 1963 album "The Freewheelin' Bob Dylan" and as a single.
I was a zookeeper. Shiva, she fell into one of the concrete moats in our exhibit. It was empty. The vets where on their way, but her leg was ripped open. She was going to bleed out. The sound she made... She was in so much pain. I knew the risk, but...
In the fight scene at the Pig Trade, minute 27, Richards gun is lying on the ground near to him as Morgan reaches out to help him up with help from Ezekiel. In the next cut, Morgan is holding Richard's gun and hands it to him.