I wouldn't kill the snakes you find unless you want to have a vermin problem. But if it was a rattlesnake, I'm fairly confident that you would not have found the chick at all.
I'm really sorry for your loss. Sometimes the little ones just don't make it for one reason or another, that's why most prey birds are so prolific.
I'm really sorry for your loss. Sometimes the little ones just don't make it for one reason or another, that's why most prey birds are so prolific.