Took Ddog for a new walk earlier. It was a footpath she ran in a stream near a crop field. Since getting in she is very uncomfortable and can't settle. She keeps chewing at her feet and can't settle , keeps jumping up shaking her paws. I have checked them , no tears, thorns or anything. I have showered her and bathed her paws in cold water but still chewing and twitching away. I think there must have been some kind of chemical in the stream any advice? I'll take her to the vets if no better tomorrow!