When did Jack dog get kidnapped?

It seems like you're referring to a fictional story or event. There's no real-life case of a "Jack dog" being kidnapped that I'm aware of.

To help me understand your question better, could you please provide more context?

For example, tell me:

* Is this a story you've read or watched? If so, what is the title or author?

* Are you thinking of a specific fictional dog character named Jack?

* Could you describe any details about the kidnapping, like when or where it happened?

With more information, I can give you a more helpful answer!