Guide: Breeds

Blah blah. Griffins, equines and dragons can all interbreed.
Breeds are determined by two bloodlines, each from a certain genus(?).
Some breeds are called 'pure' as their two bloodline parts are the same; for example Mystic x Mystic, or Persian x Persian. Crossing two individuals of the same pure breed will always result in offspring of the same breed.
All other breeds are called 'hybrids'. You can produce these by crossing different pure breeds, or by crossing various hybrids. Breeding hybrids together will never guarantee a certain breed. If the 2 parents have 4 different bloodlines, their offspring will have 4 potential hybrid breeds, all different from either parent!