Realize that kittens usually attach themselves to adult dogs, who in general aren't threatened by kittens.
Understand that dogs instinctively chase animals that run or move suddenly, even if they're used to being around other cats.
Introduce the kitten while the dog is either closely monitored by someone else or is on a leash. Do this several times over a period of several weeks to allow time for each animal to grow comfortable.
Make introductions a positive experience for the dog, and reward her with plenty of praise and treats when she shows appropriate behavior.
Give an immediate and sharp 'No!' if the dog is unfriendly toward the kitten, but avoid shouting if the dog behaves inappropriately.
Realize that an adult cat may perceive the dog as a threat to his status and may protest by marking his territory. This is normal behavior for a cat under stress.
Avoid allowing a puppy or dog to roam the house freely during the first few weeks of her introduction to an adult cat.
Provide a special area for the cat that's inaccessible to the dog. Be sure to place food, water and a litter box in the area.
Be aware that both the dog and the cat need space and special attention; bathing and grooming should take place in private.
Place the cat on a table and pet him for reassurance, while having the dog sit on the floor nearby.
Alternatively, place the puppy or dog in a cage, and let the cat approach.
Allow the cat to swat at the dog (within reason) when they finally meet nose to nose. This is a cat's way of establishing space boundaries.
Cats and Dogs Provided by eHow.com