Sorry, not funny at all. That could escalate into the dog killing the cat. A lot of these smaller dog breeds were used for household rodent control back when they were originally developed. They cab get rather savage if given enough motivation. ( My family had toy poodles that were great mousers.)
My old brindle dog knows better than to force a cat off his bed. I’ll remove the cat for him, but he is not to show any attitude toward a cat . Good ol’ dog. He won’t even look a cat straight in the eye …well, not one of the house cats anyway. Roaming cats in the yard are fair game, although the dog is now too old to catch them.