Chihuahuas have become popular dogs in Hollywood due to their appearance in movies and the arms of celebrities. This hype has led to a high demand for Chihuahuas, resulting in many people adopting them as fashion accessories without fully understanding their needs. Many people were unprepared for the challenges of owning a Chihuahua, leading to a large number of them being abandoned or surrendered to animal shelters. The breed's physical appearance, including their small size, big ears, and large eyes, also contributes to the high number of Chihuahuas in shelters as people prefer dogs that look more like traditional breeds.

Chihuahuas are known to shiver and tremble, which some adopters find difficult to handle. Additionally, the breed has a reputation for being biters and escape artists, further contributing to the number of Chihuahuas in shelters. Lastly, Chihuahuas can be challenging to train and housebreak, leading some families to give them up for adoption. Overall, the high number of Chihuahuas in shelters can be attributed to the mismatch between people's expectations and the realities of owning this breed. The demand created by Hollywood hype and the lack of informed, responsible pet ownership have led to the unfortunate consequences of many Chihuahuas being abandoned or surrendered to shelters.