Hello, 1 week ago, my 6yr old female Dashschund has been acting very strange. She is one of the most high-spirited dogs I have ever seen, loves to play, give kisses, etc...I have noticed when I kiss her nose or touch anywhere near her snout, she yelps in distress. I try to open her mouth to see if her gums are swollen, but all appears normal. Speifically the region around her nose seems to be very sensitive. Any idea or suggestion what may be wrong? Thank you!!