Only... kind of? Like dogs are still dogs, it's just that the happy smiling playful ones kind of inherited a bit of that essence? I don't know, I barely understand it myself. Wolves were definitely an Earth thing before they got here.

... But a lot of stuff is aliens in my world, surprisingly. Like broccoli. Broccoli isn't originally from Earth, apparently. I kind of just stopped thinking about that kind of stuff because when you have giant bladed lizard people, giant cannibalistic centipedes, and parasitic mind-controlling slugs around, space dogs and space broccoli are kind of the least of your concerns.