There’s a storytelling convention in TV and movie scriptwriting that I really don’t like.
If a dog — or a cat or horse, but most often a dog — is introduced into the plot, there is a better than 50-50 chance that the animal will die as part of the story. 
Occasionally this story convention works, but much of the time, it is quite gratuitous.
Because I feel particularly strong empathy with suffering pets, I immediately steel myself for the possibility that the animal will be killed off by saying (aloud): “Dog’s gonna die” as soon as I see the canine on the screen.
The most recent offense was on my beloved Mad Men. The dog isn’t actually killed, but if you release an Irish setter outside of a Manhattan office building — even in 1962 — what are the odds? Poor Chauncey.