Imagine if aliens abducted a bunch of humans, and came back thousands of years later, but the humans with them are different now
They still look human, for the most part, though some are smaller, some are larger, they’re strangely colored now, colors not natural for humans to have. Their faces and bodies are strangely proportioned, their ears droop oddly, their mentality is strange
Even more terrifying, they’ve been trained to attack and mob normal humans, ripping them to shreds, while the aliens move in to finish them off with their weapons
now consider that’s more or less whats happened with dogs here
Let me set something straight. It’s not just that they look different, it’s that they look more like puppies (called neoteny).
So really it’s more like if the aliens came at you with man sized toddlers