is it only common to dogs or are other animals susceptible to this as well?
Humans as well
Syringomyelia
Syringomyelia has a prevalence estimated at 8.4 cases per 100,000 people, with symptoms usually beginning in young adulthood. Signs of the disorder tend to develop slowly, although sudden onset may occur with coughing, straining, or myelopathy.
how big does a king charles cavalier get Historically the Cavalier King Charles Spaniel was a lap dog and is small for a spaniel, with fully grown adults comparable in size to adolescents of other larger spaniel breeds. did this species diverge from some other group? Yes - spaniel can you please describe this species? A type of gun dog with a long silky coat and drooping ears, broad muzzle. The prevailing color is liver and white, sometimes red and white or black and white, and sometimes deep brown, or black on the face and breast, with a tan spot over each eye. are they popular? Yes - The Cavalier King Charles Spaniel has grown in popularity in the United States and ranks as the 19th most popular pure-breed in the United States. how is their behavior? highly affectionate, playful, extremely patient and eager to please. can you mention any common disease/ailments that they suffer from? Mitral valve disease, syringomyelia, hip dysplasia what are the symptoms of the second? mild discomfort to severe pain and partial paralysis.
wiki:19615192
Syringomyelia [SEP] Introduction
These symptoms typically vary depending on the extent and, often more critically, on the location of the syrinx within the spinal cord. Syringomyelia has a prevalence estimated at 8.4 cases per 100,000 people, with symptoms usually beginning in young adulthood. Signs of the disorder tend to develop slowly, although sudden onset may occur with coughing, straining, or myelopathy.