Are Cairn Terriers easy to train?

No, Cairn Terriers are not easy to train compared to some breeds. Although they are intelligent and quick learners, they are also independent and strong-willed, so they are somewhat challenging to train.  

However, t raining any dog takes substantial time and effort, regardless of breed, and with patience, consistency, and positive reinforcement, Cairn Terriers can become well-behaved and obedient companions. Begin training your Cairn Terrier as soon as you bring them home, ideally when they are still a puppy. Early training is essential to establish good habits, manners, and a strong bond with your dog.