June also had an upper respiratory infection about 2 weeks after we brought her home. She would cough and gag and just lay down wherever she was and sleep. She didn't throw up or have a hard time eating though. The vet gave me some cough suppressant pills (basically Robitussin) that she said we could buy at the drug store and benedryl to help her sleep at night. It got worse before it got better, but it did last a little over a week before it went away. 1 morning we woke up and she just never started coughing again. We were worried it was pneumonia too so we took her to the ER vet 2 days after he normal vet (for a second opinion-and we were freaking out) and they did x-rays which confirmed it wasn't anything serious like that. I think the symptoms include snotty nose, fever, and not eating. None of which June had.