15 Interesting Facts About Havanese Dogs By Allen Abby - In spite of their mini size, these dogs are easily trainable and often used as service dogs. In Great Britain, a Havanese was recently accepted into the Hearing Ear Program to be trained as a service dog for the hearing impaired. Their trainable nature has also resulted in them being used to sniffing out mold and termites, herd ducks, and even work as circus performers. Please follow and like us: