I Had To Put My Dog Down

I didn't talk about him much on this blog but for about 7 years a pit-bull dachsund mix lived with us. His name was Blue. He used to love going out to the garden with me and catching the squirrels I shot out of the trees with my pellet gun. His favorite word was "walk". Kathleen used to take him to parks around here to let him hunt ground squirrels. He was a good dog. But he hurt his back five days ago and was in a lot of pain. I never want to put another dog down as long as I live. Before I shot him I gave him a last meal of baccon and tranquilizers. He ate it happily. I feel like I should go to confession but that doesn't meet up with what my mind says is true. Why am I crying?