[wincy]

It’s hard to say as the further you get away from a common ancestor the more the behavior of different species diverges (maybe a bit tautological, but still worth pointing out).

I played with my pet rat and we were good friends. We’d play little games and I’d tickle her Rats and humans diverged maybe 80 million years ago. Interestingly, humans and dogs diverged perhaps 100 million years ago, and we know we can communicate with dogs.

However an octopus is ~600 million years away from a mutual common ancestor, which is way back in the Precambrian. It’s an order of magnitude more time.

[msla]

Humans created dogs out of the wolves best able to communicate with humans.

It's been a consistent artificial selection pressure.

[labster]

Dogs created civilization out of humans by consistently helping the most cooperative ones. Even today, dog “owners” live longer and attract more mates. It’s consistent selection pressure.

[Kye]

Dogs even developed facial muscles to communicate with human expressions.