Persistent deciduous teeth, also known as “shark teeth” nadisja/Getty Images
Seven per cent of pet dogs mostly small, toy breeds have doubled-up teeth, reminiscent of sharks mouths. The condition, known as persistent deciduous teeth, occurs when the dogs baby teeth remain fixed in the jaw, close to the adult teeth, instead of falling out, creating rows of teeth similar to those seen in sharks.
To investigate these “shark teeth”, at Waltham Petcare Science Institute in Leicestershire, UK, and her colleagues examined the records of 2.8 million purebred dogs in the US from veterinary visits occurring between…
