DOG walkers who frequent local beauty spots have been told to stay vigilant following fresh cases of a so-called seasonal canine illness.
The mystery disease, which has no known cause, is thought to have affected at least five dogs recently following walks in Blidworth Woods, Sherwood Forest and Clumber Park.
Nottinghamshire county councillor John Cottee, cabinet member for culture and communities, said the council was working with partner agencies to resolve the problem.
“No obvious cause has yet been found and nothing has been ruled out,” he said.
Up to 10 dogs are thought to have died as a result of the illness since 2009.
Many more animals became unwell - with symptoms including severe vomiting, diarrhoea, shaking and trembling and high temperature - a day after walking in the countryside, especially in woodlands.
One dog owner got in touch with the Chad after her two dogs were struck down with sickness and diarrhoea following a walk at Sherwood Forest on 30th August. Fortunately they recovered 36 hours later.
l Dog walkers can help establish the cause by filling in an questionnaire online at www.aht.org.uk/seasonal_illness.html.