The family didn't die trying to save the dog.
The 16 year old boy tried to save the dog, then returned to shore. Good judgment.
The family tried to save each other, the dog was not an issue. Their efforts were valiant, but futile.
"Peace is that brief, glorious moment in history when everybody stands around reloading". Anonymous
Earp: Not everyone who knows you hates you.
DOC: I know it ain't always easy bein' my friend....but I'll BE THERE when you need me.