Who thinks Little Ann died off depression and a broke heart

I read the chapter again. Is this a trick question? I don't see anyone stating that she died of depression. It is clearly implied. Billy's description of a weak and feeble Little Ann crawling to Old Dan's grave pretty much sums up the dog's despair. Mother and father give spiritual reasons to Billy for the dogs' demise. Billy, however, is the narrator so I'm going to go with him. Am I right? Do I win anything?