"Do they have our cats?"
Translation:Har de kattene våre?
The possessive can go on either side of the noun in Norwegian.
In most cases, placing it after the noun will feel a little more natural, but there are exceptions. If you want to stress the possessive, you put it first. There are also some nouns that tend to go after the possessive regardless, either because they sound better that way, or because they're part of a fixed expression.