My toddler couldn't recognize her reflection in a mirror up until some age, we did the lipstick on face test. Same as a cat or some other animal that can't do i

My toddler couldn't recognize her reflection in a mirror up until some age, we did the lipstick on face test. Same as a cat or some other animal that can't do it. Complex emotions and consciousness are developmental milestones in kids. Not sure why animals would have it differently, they just don't develop to the same level as we do.