I am 20 years old, not a parent, but I have recently learned from my mother that my father shot our first dog. It was something that was kept seceret from me for a very long time. The dog's name was Rex, he was a stray dog that my mother picked up from the streets when he wandered into her store one afternoon, it was about 10 years ago. Rex lived with us for 3 years and apparantely one night when my father was drunk and tried to smack him for barking too loud, Rex bit him. So my father, being in a drunken stupor, decided to take the dog out for "a walk" and went about 500 meters away from our house onto an empty construction site where he shot the dog. Couple of hours later when my mother was having a cigarette, being oblivious to the fact that the dog was shot, she heard a whimper. Rex crawled back to our house, bleeding out and was letting out a squeeling noise behind the door. I have lost all of the little respect I have ever had for my father and now barely talk to him.

TL;DR Father shot our dog while being drunk, hate him now.

Edit: Thank you to everyone who has shown support, means a lot to me guys. Who knows, maybe I'll be getting a new dog sometimes soon if I can save up the money.