The incident occurred in Verulamium Park at around 10.45am. The victim, a 29-year-old woman, had been walking her dog on a lead when another dog ran over to her and bit her on the forearm, according to police. The owner of the dog who bit the woman is described as a white woman, 5ft 10in to 6ft tall and of stocky build. She had dark brown hair in a ponytail and was wearing light cream tracksuit bottoms, brown trainers and a dark navy jacket.The dog is described as a Staffordshire bull terrier with a black shiny coat, which was stocky and possibly aged around 18 months old. Anyone who saw what happened, believes they saw the owner and the dog in the park that morning or who recognises the description is asked to contact PC Marc Capicotto via the Herts Police non-emergency number 101. Alternatively call Crimestoppers anonymously on 0800 555 111.