Yesterday my five year old Sheltie began, out of the blue, to breathe rapidly out of her nose and made sounds like snorting. Her eyes were tight and watery. It was like she was fighting to breathe. This freaked me out as it was very scary to watch this. I took her outside to get some fresh air. It helped a bit but she started doing it again. She was then fine the rest of the day. She started doing it again this morning. I can't get to into the vet until tomorrow.
Has anyone's pet experienced this and/or have any suggestions for what I do for her to help?