Lady (our only dog) is not supposed to chase the cats (we have three).  Furthermore, she knows she's not supposed to chase them.   Of course, she still does it when she thinks we're not looking.

It's the funniest thing.  Let's say she's chasing one of the cats down the hall and into the living room.  Human just happens to be in the living room, standing next to the hall entrance.  Cat zips around the corner into the living room, seeking a defensible space.  A second later, Lady careens around the same corner in hot pursuit, only to encounter Human looking askance at her.  Lady stops, puts herself into a down stay.   Human asks, "You weren't chasing the cat, were you?"  Lady looks up innocently, as if to say, "Me?  Chasing the cat?  Oh, no, Mama, I know I'm not supposed to do that.  It must have been your other little doggy."  Human:  "Our other dog.  Check.  We have so many of them, after all . . ."

What a little rascal!

Toby likes to chase my moms cat until one time when she turned around and pinned him to the ground and bit him. He is now very careful on playing with her. This kitty is a little bigger then my pup but boy did she put him in his place. It was too funny but he deserved it.

Fortunately, Lady is pretty much all bluster.  As many of you have commented with regard to your pups, all it takes is one good smack from the cats for Lady to beat a hasty retreat.  She then gives them a wide berth for a week or so, until she apparently forgets about being swiped across the nose . . .

My guy, Jack, a rescue dog...LOVES his cats.  When I first took him in,  they were only kittens. (2 months old) He would very methodically give them face baths every morning, and I have some great photos with all three sleepiong together I need to have scanned so I can post them  Sure he chased them sometimes, "But only for the exercise, Mom... we don't want them growing up to be fat!

fat!"