HGG Community Forums

In practical terms, there is no danger or penalty for inbreeding in the game, except for the usual warning about pairing horses that both carry potentially homozygous lethal genes. I have some pasture started lines where putting second gen into the pasture for breeding often results in inbred foals. Personally, I don't worry too much about it, although some players don't like to see inbred lines and shy away from buying inbred horses. Others, like me, don't care much.

So, since the colt sounds like he's superior to sire and you like his markings, go ahead and keep and breed him if you wish, especially if you think you'll be keeping him and his offspring in-house--as long as you decide you don't mind a bit of inbreeding.