The red and white King Charles Spaniel is called the Blenheim, in honor of one of the original breeds used to create the current breed. Here the Ch. Cheri-A's Lord Andrew, the number one King Charles Spaniel of all times. 
A curious little man, the King Charles Spaniel is endowed with a head too large for its size, rounded, and plump looking but not coarse. It is snub, with a very short muzzle, with a wide, square jaw with a slight inferior prognathism. The ears are very long, low inserted, and its expression reveals intelligence and affection. It has a compact, square and deep body, with a wide back. The neck is moderately lengthed, and the tail, carried not over or under the backline. The coat, long, silky and straight. A slight wave is admitted, never rigid. The ears, body, chest and legs with abundant bristles. The four colors are: white and red (Blenheim); tricolor (Prince Charles); ruby red; and black and tan (King Charles). The red can have a small white spot at the chest, but no more. The movement should have good amplitude and impulse due the foreleg straightness and good hind angulations. The King Charles Spaniel’s ideal adult weight is between 3.6 and 6.3 kg.
Comical and sweet, the King Charles Spaniel, also known as English toy Spaniel, is a delicate but resistant breed, which needs a subtle owner, for its handling as well. Despite its peculiar appearance – for some – it is a perfectly normal dog that can be trained. It is not recommendable that small children handle the puppies, due to their frailty and large rounded head. It loves to be with its people and bonds with the family.
The head gives the breed distinction. The eyes prominent and the long ears require careful attention. 
The small King Charles Spaniel is born with only 140 to 280 g, and after eight weeks should weigh between 2 and 2.5 kg. The puppy is born with a lack of pigmentation, which soon completes. According to breeders there is no growth problems or out of the ordinary growth. The King Charles Spaniel grows at a good pace, reaching its maximum height and sexual maturity at around one year. Hair and body growth is usually not completed until after two years. A lack of appetite or over eating is rare. A specific diet is not required, although the owner must make sure of proper bone growth, at the limbs as well as the head.
The King Charles Spaniel puppies are deliciously chubby, and grow at a good pace without too many problems. 
The King Charles Spaniel requires little special care, and lives an average of 9 to 15 years. As other small company dogs, it has a predisposition to kneecap luxation and other joint problems. Bone frailty should be avoided. Owners report eye problems, due in part to the prominent eyes. In this breed there are respiratory difficulty cases (due in part to the head brachicephalus structure), diabetes mellitus, congestive coronary disease, umbilical hernia and insufficient fontanella closure (soft orifice on the skull that remains as an adult). Hair care is not complicated, but requires consistency, especially the limb and ear’s long hair. The dropped ear, with abundant hair, can be prone to ear infections, especially during warm weather, and closing with inferior prognathism makes teeth care even more important.
The red puppy (ruby) with a small white spot at the chest which should disappear as an adult, and a tricolor (Prince Charles) showing two of the four admitted colors.