Raptor
The goat ate my homework
However, I have to say that if I lived in your area, and my dog escaped his yard, and got shot whilst running down the road, I would sue the pants off the person that shot him. Call animal control and have him put in the shelter. But unless my dog is killing something of yours...you have no right to kill my dog. Period. I would be willing to bet that unless my dog was physically on your property causing damage...I would win.
Animal control won't pick up this far out. I'm out of city limits. If they would, I'd be calling them on the neighbors who constantly let their mange infected dogs run around. You'd also have a hard time finding the person who shot it.
Good! About time that people start getting serious time for this. Also, how are you (Raptor) so sure of what cruel is? I've never been dealt an instant and fatal gun shot wound, as I'm sure you haven't as well, so there could have been tremendous suffering in whatever time it took for the dog to effectively die.
As for the circumstance... well, maybe your neighborhood is different than mine, but anyone shooting a dog for running loose (which happens accidentally all of the time) should also be dealt a serious sentence. My neighbors would be hard pressed to get away with killing my dog, who's like my child, in the event that she decided to break off of a leash and enter their property.
Also, the comparison to feeding snakes mice and this just ridiculous. I can't stand empty rhetoric, when people know darn well the intentions behind feeding a snake a mouse (which it has adapted to eating far before human domestication) and killing a dog. Dogs should be treated with a lot more respect and compassion in our society. Anyone who has ever built a bond with a dog would know how strong it is, and to betray that bond, especially with something as severe as murder, it should be held against the perpetrator in the harshest way.
A gunshot to the back of the head is instant since it destroys both the brain stem and brain itself. That's as instant as you can get. The entire definition is no time between the cause and effect.
Again, when I was speaking about mice, I was referring to the methods of pre-killing. I'm fairly sure that improperly killing a mouse so that it's quite alive but injured could be considered cruel. That's what I'm talking about with the mice.