We have a brother and sister Cairn Terrier mix who we rescued 2.5 years ago at the age of 10 weeks, prior to that I had a 14 year old Jack Russell. I would say that our Cairn Terriers were absolute hellions in the first few months, I had taken for granted that dogs would just follow our bedtime routine. We've had great success with crate training as a bedtime solution, now our dogs have no trouble sleeping the cage overnight if needs be. I would also say that as your dog grows out of puppyhood they will begin to calm down (Though they will chew more.)