The average lifespan of a Yorkie Bichon is between 12 to 15 years. Yorkie Bichons are a mixed breed that is a cross between a Yorkshire Terrier and a Bichon Frise. They are small dogs that typically weigh between 7 to 12 pounds and stand 8 to 12 inches tall at the shoulder. Yorkie Bichons are known for their long, silky hair, their friendly and affectionate nature, and their intelligence.