ok, my conclusions:

1.Yellow house has Norwegian, who drinks water, smokes Dunhill and rears Cats.

2. Blue house has Dane who drinks Tea, smokes Blends, and has Horses

3. Red house has Brit who drinks Milk, Smokes Pall Mall and has Birds

4. White house has Swede who drinks Beer, smokes Blue Master and has Dogs

5. Green House has German, who drinks Coffee, smokes Prince and has FISH.

So the German owns the Fish.

Is this correct?