We rescued a dog that looked exactly like yours, only a cream color. According to our vet, she was mostly Wheaten terrier. Look one up on a dog book and you'll see what I mean. Mostly, as her long plume-like tail definitely wasn't terrier. She was a great dog. We had her for 12 years. Our groomer would trim her body close to the body but lightly trim around her head, making her look like a little lion.