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Here Meghan meets a German Shepherd named Ricks. Rex's rejection of Megan's approach arouses Megan's interest in Rex, who hopes to become Rex's trainer.
Because of Meghan's previous performance, her boss refused her to join the military dog unit. Meghan persistently completes difficult training requirements, successfully joins the Marine Corps' canine division, and unexpectedly gets a chance to team up with Rex.
Gradually, Meghan discovered that Rex just longed to be approached and barked just for fear of being hurt. Megan tried to get into Rex's heart little by little, and was gradually accepted by Rex.