What kind of shampoo is good for itchy dry skin?
Oatmeal shampoo

 What type of shampoo is good for a dog with sensitive skin?
Hypoallergenic shampoo

 At what age should i start introducing grooming to my puppy?
At two months old with monthly nail trims and baths ( must start puppy shots)

At what age can my puppy have an all over haircut?
After 6 months of age

How often should i brush my Poodle, Pomeranian, Westie, Shih Tzu...?
Daily to prevent tangles that will turn into Matts and then pelt.

 How often should i brush my dogs teeth?
Daily just like people.

 How often should i bathe my dog? Every 4-6 weeks with conditioning Can i bathe my dog every week?
Yes, just make sure to use a conditioner as well, to not strip your dogs skin and coat of it's natural oils that are needed.

How often should i get my dogs nails clipped?
Every 4 weeks