I have two female Smooth Fox Terriers (4 years old and 9 monhts old) ... they sleep alot too, ut like the other answer ... they wake up with a gentle word, etc ... of course when they are not sleeping watch-out! Big bundles of energy ... which is why maybe they sleep alot to be ready for those energetic moments ...

Yes, mine 'sleeps' a lot, generally. But I think you'll find that if you whisper your dog's name very quietly, or one of her treasured words, like 'goodie' for mine, or 'want to go bye-bye' quietly that she/he wasn't really sleeping. Just truly resting his/her eyes. My Jack Russell/Fox Terrier (very pointy nose, I'm told she's a mix) sleeps when I'm busy and when I'm ready to go she's ready to go. Nice combination. She's probably less than 2 years old. But I'm reminded in my readings to not take advantage of the cat-like nature because I remember once not taking her out for a day and she got a bit unsettled so I try to get her out once or twice a day, even if very late. Then she's incredibly relaxed in the house. By the way, she's not one to bark. A lucky thing for me! I wouldn't worry about the sleep but see that she/he gets good exercise too!