I asked this question about 20 years ago. But I will try to rephrase it, in a slightly different way, if that’s possible.
I think the example I gave c. 20 years ago, was that I would be getting my dog a treat. And s/he would be watching me intently as I did. Then I would stumble a little, and he or she would wag his tail a little. Which seems odd. I mean, he wasn’t glad I was stumbling, esp. as I was getting him a treat. So he must’ve thought it was funny or something.
Also, I don’t know if I originally brought this up. But then there was our sheep dog Tiffany (Tiffany is of course the all-white dog). She would often tease our Siamese cat Chi Chi. My mother first told me about it. She would butt Chi Chi with her nose, then watch for a reaction. I eventually did witness her doing that once. I don’t know if teasing equals humor. But you have to admit, it served no other logical purpose.
Also, speaking of Tiffany, when I was still rather young, I would go ‘Meow!’ like a cat, and grab her. Then she would seem to mildly protest, in feigned annoyance. I’m serious. And she would often nip at her best friend Sandy’s back legs. Then Sandy would simply sit down (Sandy is the orange one in this picture, again). Seems like humor to me. Though I know some of you may say not for some reason.
I actually think animals have all the same feelings we do, though of course none of the intelligence. I know I am going off on a tangent a little here. But it’s true. Joy, hate, antagonism, love, friendship. Or maybe we humans just feel animals emotions. Did you ever consider that? Animals emotions, including humor. Why not?
:):):):)