Oh I want to help!!!! I'd love to be a supporter, or moderator, things like that. I'm good at science, I can create some genetic information for you. If you give me every piece of info involving the genetics you want, I can most likely develop a plan for you.
Say that maybe 3/10 thoroughbreds carry a recessive trait for a pure black coat. I can crunch some numbers and maybe even develop an algorithm for the percentage of traits, rarity, and outcome chance. So maybe 25% of quarter horses carry a recessive for black hooves (just an example), and you had 300 horses made so far, 75 of those can be pinned with the gene. If a player were to match up with a quarter horse with the recessive, and their horse had the recessive, it would produce that trait. I'm not good at coding, but I can probably figure out how to make a code linked to the horses with certain traits that will let us know when they match with another, so we can implement the hidden outcome.
WOW, sorry for all that! I'm just really excited.