My shihtzu goes around the house licking the floors like there’s something in his throat, doesn’t happen often he doesn’t drool, he just acts like he’s frantic to get something out of his throat. I asked our vet and he said its a behavior, like stress. I give him small bites of a Popsicle and it gets better pretty quick, I also give him a benedryl., I believe his throat swells due to allergies and he’s trying to relieve it. He has skin allergies and constant ear infections, he’s allergic to turkey and chicken proteins so I have him on lamb dog food, it is a little better but He still has itchy ears and gets ear and eye infections.