Lily is 1.5 years Maltese. She has never had a reaction to a vaccine a d she has never showed any signs of having allergies. She went to the vet Wednesday afternoons do got a rabies vaccine and seemed fine after. Thursday she was lethargic which is not unusual for her after a vaccine. Friday she woke up with her nose completely clogged, with clear fluid dripping from it. I took her to the vet to have her checked out. The vet was not concerned because Lily had no fever, ate a bit of wet food for her and did not have diarrhea. So great, I thought nothing to worry about... Well Friday evening she started to get stuffed up again and wheezed from her nose and panted all night long. I stayed awake with her, I was so worried. When I got her up in the morning the wheezing subsided and she ate and drank a little bit for me. I was going to take her back to the vet but but is resting now and seems ok, only wheezing a little. Has anyone experienced this? Does this sound like a cold? An allergic reaction to the vaccine? Should I give her Benadryl? She's very little 4.5 lbs, I worry about her exhausting herself with labored breathing.