If “new blood” needs to be brought into the herd, introduce horses who are historically significant to the TRNP and prioritize the Nokota horses.  A 2018 study from Texas A&M found that the historic herd is at risk of inbreeding and recommended introducing new mares and changing removal strategies to preserve genetics and lineages.

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- Given concerns about its potential for permanent sterilization and injection site abscesses, eliminate the use of GonaCon for the fertility control program. When administering any fertility control program, the NPS must consider the herd’s genetics and bloodlines as well as the safety of mares. Instead of GonaCon, the NPS should implement a fertility control program using PZP that has been proven to be reversible and safe for the mare.