Dog is out of control. Doesn't matter what he thinks of the cat, not his choice!
Leerburg | Introducing Dogs or Puppies into Homes with Cats
Introducing Shepherd to cats
Dogs/Puppy "never " chases the cat "ever" bark and no chase is "not" good enough! Cats should be a non entity! Cats are free to interact with the dogs if they chose, the dogs "never" goes after the cat!
Five dogs, 14 years and up to 16 cats at one time. In all that time I have "never" had a single cat dog incident. My dogs don't even "see" cats on walks, they are not prey to them.