Initially, leave the pup with an indestructible toy or raw bone (we have used beef ribs and soup bones). There are several toys that are designed to be stuffed such as Kongs, we use the extreme black Kongs, fill them with some of the dogs daily ration of food and some yogurt and freeze them.
This can keep a pup entertained for several hours. Once they are adults, it won't take so long to eat, but with good behaviors set up early in life, the dog has the best chance of remaining calm and quiet all day.
If possible, kennel your pup next to a calm older dog to help encourage calm behaviors. This is also where temperament comes in to play.
If you picked a pup with a solid temperament from parents with an off-switch, your job will be much easier than with a nervous highly strung pup.
Take your pup for a short walk or do a little low-key training before putting the pup in the kennel.
Make sure the exercise is calm, just a walk on leash, not ball play. Our pups often do a little tracking in the mornings.
Do not be excited or talk in a high pitched voice when leaving the pup or taking him out of the kennel, walk slowly and calmly, and wait for the pup to be calm before leaving or opening the door.
Other good behaviors are to encourage the pup to be calm and sitting before being let out of the crate or kennel. Do not let them out or give food to a pup who is making lots of noise.
Trying to Train My Dog to be Good Around Other Dogs and My Cat!
Remember any attention can be rewarding so don't yell at a barking dog either. Some people suggest bark collars but in our experience, these just make the dog more frustrated and more likely to engage in other destructive behaviors.
It is very difficult to change behaviors in older dogs who have not been taught to accept being in a crate or kennel.