I cannot finish the tricks stage in horse hobby

For several weeks now I have had 1 constant, then eventually 2 constant people at the house stables constantly doing tricks with the horses. Weeks later and I have finished all the other training areas and it still says I haven't finished the Horse Tricks and do not have a 2 Star Horse. Of course, it won't allow you to purchase a 2 star horse until you finish the Horse Tricks section. 3-4 weeks of constant horse tricks seems like that would be long enough?