“Cavalier King Charles spaniels, we learnt, often suffer from the brain abnormality known as a Chiari malformation, which humans also get. Labradors can develop malignant meningiomas. The spaniels’ problem is the result of selective breeding aimed to produce the small round head which wins points at dog shows. The malformation leads to spinal cord damage, and the poor creatures suffer from intractable pain and scratch themselves incessantly.”
