* Chihuahua: While the Chihuahua is often considered the smallest dog breed, it is actually quite variable in size. Some Chihuahuas can be very small, while others are larger.
* Yorkshire Terrier: The Yorkshire Terrier is often considered the second smallest breed, with a standard weight of 4-7 pounds.
Other breeds that could potentially be considered for "second smallest" include:
* Russian Toy: A very small breed, with a standard weight of 2-6 pounds.
* Pomeranian: While Pomeranians are known for their fluffy coats, they are actually quite small, with a standard weight of 3-7 pounds.
Ultimately, determining the second smallest dog breed depends on how you define "small" and which specific individuals are being compared.