riddle by albert einstein

This one is a good one made by albert einsteien (yes i figured it out without looking at the answer provided on the page i got it from)
This will take you at least half an hour to solve so be patient. Good luck.

Again, if you heard this riddle before and know the answer, don't say anything



There are 5 houses, each with a different color arranged in a
straight row. Within each house lives a different owner, all of
different nationality. Each of the 5 owners drinks a different
beverage, smoke a different brand of cigar, and keep a different
type of pet. You are facing the row of houses and read left to
right.

Hints:
1. The Brit lives in a red house.
2. The Swede keeps dogs as pets.
3. The Dane drinks tea.
4. The green house is on the left of the white house.
5. The green house owner drinks coffee.
6. The owner who smokes Pall Mall, keeps birds.
7. The owner of the yellow house smokes Dunhill.
8. The owner living in the house right in the middle drinks
milk.
9. The Norwegian lives in the first house.
10. The owner who smokes Blend lives next to the one who
keeps cats.
11. The owner who keeps horses lives next to the one who
smokes Dunhill.
12. The owner who smokes Blue Master drinks beer.
13. The German smokes Prince.
14. The Norwegian lives next to the blue house.
15. The man who smokes Blend has a neighbor who drinks
water.

Question: Who has fish for pets?