DOG owners have been advised to be on the alert for a lethal substance on Shepway and Dover beaches.
Palm oil has been found washed up on beaches to the west of the area in boulder-like sizes and is deadly to dogs with some casualties already reported.
Tony Barnes from Manor Vets in Folkestone said: “If it’s being washed up, the worry is the contamination of feet and then the dogs licking themselves. It’s something that I have never come across.
“The immediate thing that springs to mind is do not take your dog to the beach if there is any doubt and if they do take them to beach keep them on a lead and wash them after.
“It could cause gastroenteritis which is an inflammation of the stomach and intestine.”
The oil is thought to have been spotted in Rye and Camber Sands in East Sussex recently.
Chris Gardner, of St Clements Vets in Truro, Cornwall told the BBC said: "We were seeing dogs on a daily basis two weeks ago. Then it went quiet in the storms, probably because there weren't so many people on the beaches.”
The source is not yet known.