No need here it is. Shall I quote everything so you can read it in the right context?
You can reasonably defend yourself. But running into the house (out of danger) to get your gun, than running back outside ( putting yourself back into danger) now shooting your gun at a dog (reckless endangerment), assuming its in your yard, that is running around when there is other options available. Ie: water hose, broom, bat, shoes, etc...
So lets see the possible charges (just for fun)
Place to keep
Reckless endangerment
Cruelty to animals
Then again I'm just another guy presenting his opinion on the matter. People do dumb shit all the time, that's how we get case law. People will do what they THINK is right, and we can let the court decide their fate.
Except in the scenario given, the dog came into the house and attacked the puppy. So retrieving your gun, especially if already carrying or if it were kept close enough as if it were carried, shouldn't require you to go anywhere.....so place to keep charge is not an issue.
As for cruelty to animals, I do not believe using force, including deadly force to stop an animal from attacking, would be considered cruelty. And more to the point, I doubt any trier of fact, judge or jury, would see it as such. As a matter of fact, I doubt any prosecutor would even consider bring those charges.
As for reckless endangerment, you can be charged with that even after a completely justified self-defense shooting. So should we just forgo any use of a firearm for self-defense because you MAY be charged with reckless endangerment?