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I am sorry to hear you are worried about Maddie. My name is Rebecca. I am a veterinarian and will do my best to help.
I see she won't drink; is she eating? If she can eat and swallow, that is a good sign.
If she is licking her nose a lot, she might be nauseous, or have a runny nose from allergies or a respiratory infection. If I could, I would take her temperature, palpate her lymph nodes, listen to her lungs with a stethoscope, and try to look as far into her mouth and throat as she will allow.
For coughing you could try 1/4th of a teaspoon of Robitussin DM (only the DM formula) twice daily.
Let me know if she is eating, and if her gums look a normal pink color or not.
How is Maddie doing? I hope you were able to see what I wrote and sent. Please let me know if this was helpful and if I can answer anything else.