10yo Hc New 12 2021 | Kdv Rbv N127 Boy 16yo With

Wait, "HC" in the context of a 10-year-old horse could mean Health Certificate. Maybe "new 12 2021" refers to a vaccine or registration date. So, putting it all together: The user might be a 16-year-old boy in 2021 who's new to horse care (HC) and has a 10-year-old horse (health certificate from December 2021). But where do KDV and RBV come in?