Also worth noting it's extremely dangerous to do with an untrained dog. All it takes is and enthusiastic "come here!" or a treat or something and now another person has access to your firearm while you don't have anything.

... This is so stupid it hurts my brain.

I actually tried to find laws relating to... stowing? carrying? transporting? a gun, in a holster, on a harness, on a dog.

I could not find any.

I very much hope this is completely legally dubious, but given the patchwork insanity of US gun laws... there might concievably be some kind of very specific situation where this would 'work' in some kind of legal sense...

IMO, the interesting case would be if the weapon is stored in your home (where nobody questions it may be), and you can summon it.

Maybe using a drone? Idk

Still falls under your control in that instance, unless you've got someone else summoning it for you (we don't need to talk about how, just assume it's a drone and not magic) at which point we're talking about a conspiracy.