Yesterday I took my terrible twosome somewhere different for a walk. It is a huge field which is owned by a rugby club with several rugby pitches. It was very boggy, but spaniels being spaniels, they loved it. At one end was a lot of ferns which led to a stream which they had a good run through.
When we got home, Millie went on what can only be described as the zoomies on steroids. She would fly from chair to chair, thrash around and then off again. She then started chewing frantically at her paws and wouldn't stop. This went on all night, despite us showering her paws down several times. Murphy, who went in the exact same places, was totally unaffected.
This area isn't used for dog walking and I at a loss to explain her discomfort.