We have never had Spot around a cat, so i don't what he thinks

Sadie and Cincy have been good with the cats they have met. They are curiuos and sniff, but have never barked at, growled at, attacked at all. My SIL's cat was the first cat they met and is a great teacher. She rules the two dog she lives with and when Sadie and Cincy met her as puppies she laid down the laws right away. It was okay to sniff, if it got to be too much, they got a warning raised paw. If that wasn't enough, they got a bop on the nose. I don't think they persued after that, but with others dogs, if that doesn't work, then the bop has claws