Einstein's Riddle Solution

[Dr Frook]

http://www.freeworldgroup.com/games8/gameindex/einsteinsriddle.htm

.............House 1.......House 2.......House 3.......House 4.......House 5
Color.......Yellow.........Blue............Red............Green.........White
Person.....Norwegian....Dane...........Brit.............GERMAN......Swede
Drink......Water..........Tea............Milk............Coffee.........Beer
Smoke.....Dunhill.........Blends.........Pall Mall........Prince.........Blue-masters
Pet.........Cats............Horse.........Birds............FISH...........Dogs

The short answer is German and Fish!