The couch-potato of terriers?
Sealyham terriers have a well-developed on/off button, which means that they easily switch between relaxation- and activity mode (some call them ‘the couch-potato of terriers’). When indoors, they are relaxed but as soon as they come out, they become rejuvenated.
Outside, the dog becomes curious will explore the explorable. Although The Sealyham Terrier is no longer used for such activities, they still have hunting instincts. You will quickly discover this when on walks, as they tend to chase after other animals.
As mentioned, the Sealyhams are independent dogs with a prevalent stubbornness. This trait becomes apparent when training them.
However, it is not impossible with consistent and determined training to make a Sealyham abide. Positive reinforcement, the use of praise, play, and goodies are pretty effective.
Devoted family dogs - reserved for strangers
This Terrier is loving and devoted to its owners but behaves somewhat reserved towards strangers, which means they can act as watchdogs. When someone approaches the front door, they will use their loud and deep barking to alert you.
However, Sealyhams are not whiny dogs by nature. With consistent training, it is possible to teach them to be quiet on command.
This breed may have some aggressive tendencies towards other dogs, so keep it on a leash if necessary.