They often have unexpected elements. For example, a character might do something completely out of the ordinary. Like a cat that suddenly starts barking like a dog.
One funny story is about a Great Dane who thought he was a lap dog. Despite his huge size, he would try to curl up on his owner's lap every evening while they watched TV. His long legs and big body would spill over, but he was so determined that it was hilarious.
Sure. One funny story is about a dog who chased its own tail. The dog thought its tail was a separate little creature and just kept running in circles trying to catch it. It was so silly yet adorable.
You can start by looking in classic literature anthologies. Many of them contain short stories that are both great and funny. For example, books like 'The Complete Short Stories of O. Henry' are a great source.
Another is 'The Ransom of Red Chief' by O. Henry as well. A couple of kidnappers try to ransom a boy, but the boy is so wild and unruly that he makes their lives a living hell and they end up paying the boy's father to take him back. It's really hilarious.
Sure. One time my Great Pyrenees thought the vacuum cleaner was a big, scary monster. Every time I turned it on, he would run and hide behind the couch, peeking out with just one eye. It was hilarious.
You can find them from your family members. Grandparents especially have a treasure trove of such stories from their own lives or from the past generations. For example, they might tell you about the time when they had a funny encounter with a neighbor's strange pet.
There was this little girl at a grocery store. She saw a bunch of bananas and thought they were giant fingers. She started yelling 'Look at those big fingers!' Everyone around was laughing so hard. It was so innocent and funny, and it was a true event that the store owner told later.
One funny Christmas story could be about a family who accidentally decorates their Christmas tree with their cat's toys instead of the regular ornaments. The cat then spends the whole day trying to reclaim its toys from the tree, much to the amusement of the family.