Gosh .. a yearling , like the post before , walking is great , and a little jogging. I have a yearling comming the day after tomorrow, and plan to show her this spring , she will be 2 then. I will do a little basic training this month and next month . Walking nicely in hand , backing up , a little trotting in hand, and basicaly building her confidence, and teaching her manners. then this winter she will have time to play with the others and be a baby, then in spring I will teach her to walk over things (tarp) do all the ground work and de spooking her, show her in whatever she is comfortable with , I think its important not to push them or they will rebel, or become confused and not trust you. I dont even use the round pen until they have mastered their basic ground work and trust me completely, and I wait until they are about 3 or 4 years old . You can do a lot with them without trying to condition them. Last show I went to they had a huge inflatable aligator under the bridge...I plan to show her all the scary things so its not a surprise to her at the show. Umbrellas, tarps , cones, pom poms, dogs , cats goats cows, etc...do the basic stuff first ,practice loading and unloading her into trailers of different sizes. This may sound crazy , but I practiced bandaging my horses legs , tail , put his feet in buckets of warm water , cold water , putting my fingers in his mouth to check his gums and teeth, anything I could think of that one day he might have to do for a vet. Maybe its just my horse ...but he is awsome , and so relaxed now, even working in hospitals with the children , and a great little driving horse. good luck , and remember its just an oppinion, and it worked for me , but might not for you.