Sometimes is good to read a post late This way I get not only the bad news but the good ones at the end.
I'm so very sorry little Herc had to go through such a painful experience and your family through such anxiety. But it's so good to know that the pup is doing well, on his way to recovery, and your brother and sister-in-law won't have to worry about the vet's bills. There was indeed a guardian angel looking over all of you and ready to reward you for your love for one another and your compassion for the little one. I hope the angel stays with you for a very long time.