The King Charles Yorkie is not a
purebred dog. It is a cross between the
Cavalier King Charles Spaniel
and the Yorkshire Terrier. The best way to determine the
temperament of a mixed breed is to look up all breeds in the cross and know you
can get any combination of any of the characteristics found in either breed.
This hybrid cross is recognized by the American Canine Hybrid Club.
Not all of these designer hybrid dogs being bred are 50%
purebred to 50% purebred. It is very common for breeders to breed
multi-generation crosses.

Tilly, the Yorkshire terrier
cross Cavalier King Charles (Blenheim) Spaniel - "My beautiful
Tilly is only around 8" tall and around 14" long. Unfortunately my
male, Duke, passed away and although they were not bought as brother
and sister, they were alike with being crossed with yorkies and
cavvies, same colour. We bred 2 litters with them and they were all
sold at 3 weeks old, none of the buyers backed out and they are
still with their loving families now. Tilly is 4 years old and is
very loving and affectionate. She keeps herself to herself and only
barks at the door. She was house-trained within 3 days of having
her, and I have never had to confine her when I leave the house
since I got her. Even when she was a pup she was well behaved in the
living room so I gave her the run of our house but only downstairs.
She is happy all the time but she has very expensive taste in food,
only the finest will do but I have to keep changing it as she goes
off it easily. A lovely little dog, I got her when she was 9
weeks old as our little rescue dog, Duke, who was the spitting image
of Tilly, passed when he was 4 due to a heart condition. Tilly has
been the calmest, happiest, loving loyal dog I have ever had in my
life. She is comfortable anywhere and with anyone including small
children. She has never growled or bitten and I hope she will stay
that way."