Unicorns were originally released through special events in the game.
There is no uni quiz. There may be some contests in players' equestrian center forums where you can win a uni, but there is nothing else.
Yes
You can't. It's not allowed on the game.
in order to get a uni on horwse you have to breed two uni's must be same breed, at exactly 6:23 or 18:23 game time.
Artificial Insemination for Howrse!! Lilcutey_2, PBS Horse Uni Breeder. Take a Look at my Page. =D
Uni-Mart was created in 1972.
Uni-link was created in 1996.
Uni-Mind was created in 1977.
Uni-ball was created in 1887.
Uni Records was created in 1966.
Uni-Systems was created in 1968.
Suden Uni was created in 2001.