Dogs 100% were selectively bred to be permanently juvenile as well.
Dogs have extreme neonatal characteristics. They are basically forever-wolf-puppies.
Their heads are rounder, eyes bigger, proportions more exaggerated, more playful etc. etc.
And we actually know the main brain difference between wolves and dogs is that dogs don’t mature basically ever neurologically.
Wolves are in basically every way smarter than dogs.
We dumbed down wolves and made them babies forever.
Our biggest rivals for millennia.
We are… fucked up.
Anyways love puppies ❤️
I mean there were actually two “intelligence” explosions for humans, once as Homo Erectus like 2 million years ago. Then again as Homo Heidelbergensis ~ 700,000 years ago. So way before dogs.
As in we have evidence of H. Erectus with brains as big or even bigger than ours. And by the time of H. Heidelbergensis our brains stabilised around the size they are today.