Are Sealyham Terriers easy to train?

No, Sealyham Terriers are not easy to train compared to some other breeds. Although they are intelligent, like many terriers, Sealyhams can be somewhat independent and stubborn and might not obey commands if they don’t see the benefit for themselves. 

Keep in mind that training any dog takes substantial time and effort, regardless of breed. Using positive reinforcement techniques, such as treats, praise, and play, can be very effective in training Sealyhams. They respond well to rewards and encouragement.