Gabor .. I'm sure U know the answer is a quick Google search
The only remaining pet is the fish, which must be owned by the German. We now know who owns the fish, and have solved the puzzle.
The completed matrix of data is as follows: House #1 #2 #3 #4 #5 Color Yellow Blue Red Green White Natl Norweg Dane Brit German Swede Bevg Water Tea Milk Coffee Beer Smokes Dunhill Blends PallM Prince BlueM Pet Cat Horse Birds Fish Dogs