A charity are trying to raise money for life-changing surgery for a puppy that was hurled from a moving van - because her back legs are fused together like a mermaid's tail. Bambi's kneecaps are on the outside of her legs which means when she tries to walk, they buckle under the pressure. The one-year-old pup's hind legs are so deformed, they almost form the shape of a mermaid's tail and she needs a life changing op to 'free her of unbearable pain.' The Cavalier King Charles Spaniel was rescued by National Animal Welfare Trust (NAWT) after she was thrown out of a moving vehicle into the middle of a busy road in Northwood, Middlesex. Jackie de Friez, centre manager at the charity, said: “We call her the mermaid puppy because her back legs are so deformed they almost make that shape of a tail.