Can anyone provide any insight as to why my 5 year old yellow lab is smacking incessantly, drooling a pool, and licking continuously? This has happened before. I believed he was nauseous and took him to the vet where he was given IV fluids and anti-nausea medicine. It happened again a few months later and we did nothing but make it cooler in the house and give him water and ice. Both worked. Yesterday, he received a bath and a treat containing glucosamine and chondroitin. A few hours later, he began exhbiting the above symptons. That continued for several hours. He accepted ice and water. This morning, he ate, drank and went to the bathroom normally. Today, he was just fine. About the same time this evening, began exhibiting the same symptoms, but with sneezing. Does anyone happen to have any of the same experiences? If so, what did you do to help alleviate them and help your pet? What was the ultimate diagnosis?