tier horses and what they are

it has just occurred to me that you might not know what a tiers are for the horses in minecraft well a tier 1 horse is a horse you can find in the wild like the white horse or black horse the tier 2 horses are horses that you breed 2 horses both are tier 1. tier 3 one can be a tier one and the other can be a tier 2 or the both can be a tier 2. and so on the same thing. If you are interested in all the different type you can go to the mo creatures form and there is a breeding map.