What major political event in Cuba led directly to the near-extinction of the breed on that island?

Answer

The Cuban Revolution starting in 1959

When the Cuban Revolution began in 1959, many upper-class Cubans fled the country and left their pets behind, resulting in the decimation of the local Havanese population.

What major political event in Cuba led directly to the near-extinction of the breed on that island?
DogpetbreedHavanese