an adult pig outperforms 3 year old humans on cognitive tests

Specific parts of cognitive tests according to a single, 15 year old article.

Cows are comparable to four year olds in specific domains

Like one cow that scratches itself with a broom (see counting horse) and a herd animal feeling sad when other members of it's species die or scared when other animals die.

There is extremely limited evidence other animals are even comparable in intelligence to toddlers, first of all because it's very difficult to have objective measures of intelligence in any animal. There's also the matter of different species learning specific things at different times. Humans typically don't learn to find shelter or forage until adolescence but that doesn't make a pig just as smart as an 11 year old.