we have a new 13week old yorkie to our family. We have never owned a new puppy and this is a new experience. Our little baby boy has like a cough/sneezing thing going on. My husband took him to the vet and he said it was due to him having shots the day before that was a week ago and sometime he has a little discharge coming out of his eye like mucous. He only does his coughing/sneezing when he has been sleeping or is outside. My vet doesn't seems concerned. Is this normal???