Question and Advice

I have a chin (2 1/2 years old) that was diagnosed with a URI 9 days ago. Symptoms were loss of weight (from 830g to 698g), a snort like sound when she breathes (only sometimes), nose swipes (more than the usual amount), and harder inhales (like she has a stuffy nose). Xrays showed lungs were clear, no sneezing, no coughing, no nasal discharge. We assumed we caught it early since these were the only signs. In fact, some were surprised that they even diagnosed it without more pronounced symptoms. She was given Baytril but because it was early and Baytril can be so hard on them, we opted for Trimeth-Sulfa. Today is day 9. She is no better but no worse. She is eating, drinking and playing (no dust bathes). At this point, do I go to the Baytril, go back and get another round of Trimeth-Sulfa? Could this be something else? Allergies? Asthma? Are those even an option? I am not hand feeding because she is eating on her own and not losing anymore weight. I was so encouraged because I thought we caught it early but now am perplexed. Help!

ADMINS: If this does not constitute an emergency, please move to the appropriate section. Thanks.