• If your Sealyham Terrier becomes overweight, he can develop back problems. Be sure to monitor his food intake and give him regular exercise to keep him in shape.
• Sealies are independent and can be stubborn when it comes to housetraining. Crate training is recommended.
• They are reserved with strangers and make good watchdogs. Their bark is surprisingly loud and deep, but they can be trained to be quiet on command.
• Sealies are fond of chasing rabbits, birds, and even other dogs and cats. Be sure to keep your Sealyham Terrier on leash when he's not in a secure area.
• Because of their unusual looks and small size, they could be targets for dog thieves. Although Sealyham Terriers do well outdoors when it's cool (they don't like heat), they should be kept in your house when you can't supervise them.
• Sealyham Terriers are a rare breed. It may be difficult to locate a reputable breeder, and even when you locate one, you may have to wait several months for a litter to be born.
• Sealyham Terriers can be aggressive toward dogs they don't know, even dogs much larger than they are. Keep your Sealyham Terrier under control until you know that both he and the other dog are friendly to each other.
• Although loyal and affectionate with their families, Sealyham Terriers can be a bit reserved around strangers.
• Sealyham Terriers are happy little dogs, but they can have a dominant personality if not kept in check by a firm, consistent master.
• Sealyham Terriers have an independent, stubborn streak. Successfully training them requires firm, consistent handling. They respond well to positive reinforcement techniques such as food rewards, praise, and play.
• Never buy a Sealyham Terrier from a puppy mill, a pet store, or a breeder who doesn't provide health clearances or guarantees. Look for a reputable breeder who tests her breeding dogs to make sure they're free of genetic diseases that they might pass onto the puppies and who breeds for sound temperaments.

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