Click the Has taxonomy term (= pets) link. In the subsequent popup, change Is one of to Is none of. Enter travel into the text box after pets, separating them with a comma, select This feed (override) in the drop-down at the top, and click Apply (this display).

Now, when we scroll down to the Preview area, we will see our final feed containing all content other than the content that was used for the first two feeds.

Great! We've finished with our view. Let's create the menu block!