The Color Wheel. A color circle, based on red, yellow and blue, is traditional in the field of art. Sir Isaac Newton developed the first circular diagram of colors in 1666. Since then, scientists and artists have studied and designed numerous variations of this concept.
Itchy Pekingese - Itching Scratching Series. The Pekingese quite commonly gets allergic skin disease from food allergy or canine atopic dermatitis. This can lead to itching, scratching, chewing and licking which in turn can lead to secondary skin infection with bacteria or yeast. The common skin infection in the dog is caused by Staphylococcus intermedius.
Most likely, your Yorkshire Terrier will have problems with people being allergic to him rather than having allergies himself. Yorkies are considered one of the better breeds of dogs for those who suffer from allergies to canine dander. Yorkies can get the usual allergies that any breed of dog can develop (even mongrels). These Yorkshire Terrier allergies include food allergies, allergies to flea bites and allergies to certain chemicals in cleaning products for the dog or for their bedding. Some Yorkies also can become allergic to pollen, just like people. And you can also ask the vets in your area yourself.