At least 65 species of animals laugh

[Catherine]

We are not the only ones that laugh. At least 65 species have been determined to actually be laughing. 

https://www.dailymail.co.uk/sciencetech/...seals.html

We are not alone in our laughter. When our pets seem to be laughing with us, they probably are. When animals seem to be laughing at us, they probably are.
So go ahead and laugh out loud. Maybe some bird or squirrel will join you and shared laughter is more fun.