It depends on your opinion.
No HorseIsle does not allow you to breed any horses. You can only ride and train them. They do, however, have the Quarter Horse breed in both HI1 and HI2.
No, you cannot breed your own foals on HorseIsle 2.
Even on horse isle, there is no one horse that is the prettiest. Everyone you ask will have a different opinion. You could go to one of the libraries and search through the breeds to find the one you're thinking of.
arabians and akhal-tekes are a few
Haflinger
Its the Argentinian breed of horse, The Criollo
The answer is Anglo-Arab Justjack101 on Howrse Justjack On Horseisle TBlover984 on avirtualhorse
Dartmoor Pony.
Selle Francaise HorseIsle Answer by CricketJumper on CHESTNUT!!!
Matter of opinion but I think the collie
Horse Isle: Paso FinoDawnFire of HorseIsle- Grey and Pinto
Welsh Cob