No, brain – what?  Why?  Why have you decided instantly upon seeing this completely unrelated picture to associate it with Moran?  Why do I now have a minor plotbunny about how after finishing a hit for Jim, he finds a stray and decides to take it in.  And maybe he trains it – at least to be quiet at the right times, because he has nowhere to leave it when he works.  And proper snipers are really supposed to have a spotter to work with, but since he doesn’t trust anyone, can’t trust anyone – he has the dog instead, who watches his back while he’s focused on the target, and maybe, later, the dog (who he names Johnny, just to be cute and Jim finds it funny when it isn’t reminding him how irritated he is that Sherlock is paying attention to John and not him) maybe saves his life, because a target got lucky, realized the hit was coming in time and sent people out to find his assassin; and maybe the dog lives, and maybe it doesn’t, because sometimes my subconscious can be cruel like that, but if I don’t decide for sure then I don’t have to worry about it.

Why, why did my brain just do that to me?  It has nothing to do with Sherlock.