Thank you so much for your feedback. Very helpufulTerriers in general have a significant prey drive, but we had a miniature schnauzer that regularly killed rabbits and squirrels but lived with two cats without issues. Our current shih-tzu/Jack Russel mix plays with cats who live at a doggy daycare.
It depends as much on the cat as it does on the dog. Cats who are accustomed to dogs often stand their ground. Cats who don't run away are no fun to chase. I had a very large black lab that loved to chase cats until he met my sister's cat who lived with four dogs. The cat refused to run away and my dog lost interest very quickly.
At the very least, you'll want to provide as escape plan for the cat - somewhere he can go to get away from the dog when he needs to. And I wouldn't leave them alone together - at least initially.
Agreed on the terrier prey drive.. I have a mini-schnauzer who spends time gazing out the window searching the frozen snow covered tundra for squirrels. He goes nuts when he eyeballs a squirrel.
At our previous home in China, he was familiar with a cat. He just wanted to play. All was good until the cat decided to run, glad I had him on a leash.
You likely won't be able to overcome the terrier prey drive. It is hard wired in them. At best you maybe able to disrupt his focus...…...big maybe.