What common behavioral issue can develop if the Yorkie-Chon owner overlooks bossiness in training?

Small dog syndrome.

Although the Yorkie-Chon is generally intelligent and eager to please, the potential for assertive behaviors, particularly stemming from the latent terrier stubbornness, exists. If owners fail to establish consistent and firm boundaries early in the dog's development, they may inadvertently allow inappropriate behaviors—such as excessive bossiness or disproportionate barking—to become ingrained habits. This phenomenon is specifically known as 'small dog syndrome,' where owners overlook or excuse behaviors in small dogs that they would correct in larger breeds. Mitigating this requires early, consistent training using positive reinforcement methods, such as praise and play-based learning, to ensure the dog develops into a well-adjusted adult rather than an overly demanding companion.