The Cairn Terrier’s coat can come in a variety of colors ranging from a sandy grey to cream and even black and is noted that their coats can change color as they age, often becoming more black or silver. Their outer coats can be described as harsh and weather resistant while having a soft undercoat. These dogs are very friendly, playful and affectionate, making them great with children or other dogs. They’re intelligent and loving, and can sometimes demand a lot of interaction from their person.