Oh sit, I stumbled into some feelings.

@freemo Nope. He's stealing his own dog from himself every twelve years. So there are multiple versions that lost their dog. Maybe it works out if he tells his past selves that he's doing it, so they don't suffer. Or, retroactively all the versions whose dog was stolen later also discovered time travel, realized what happened, and that realization made up for the time spent not knowing. Or...

@2ck Or maybe he just hangs out with his past self and they both live together and share their dog, him and multiple versions of himself all in one home, each version 12 years older than the next.