When I was a child (forever ago), there were a number of fallacies purveyed regarding animals, most of which have been proven completely false:
- Animals can't reason (false)
- Humans are the only animals that kill/murder each other (false)
- Animals can't talk (false)
- Animals can't count (false)
- Animals don't have emotions (false)
on and on...
Of course the animals don't have souls argument, but that is irellevant, since no one knows if humans do either.
Arguably, these false assertions were motivated to "elevate" humans, perhaps sometimes to justify human uses for animals such as food.

However, every day tests are conducted demonstrating that animals have practically every cognitive capability humans have, generally to a lesser degree.

Not being a an expert in this field myself, the one area I recall that has not been shown in animals is "episodic memory", the specific recall of previous events. It is distinguished from learned behavior, which is the integral of prior events. I suspect this will be established in animals eventually as well.

I assert no change in our general behavior towards animals as a conclusion, but that our arrogance should be dropped yet another peg.