I have a four year old male cat (Borgart) whom I adopted from a local
shelter 7 days ago.  He developed URI symptoms the second day I had
him. he began sneezing and I noticed very mild congestion. The biggest
sign of illness was the fact he was uninterested in food or water as
well as very tired.

I brought him to the vet on the second day and the vet prescribed an
antibiotic (zithromax) for 7 days. Poor Bogart has had a fever of
103-104 for about a week now. The sneezing subsided about a 3-4 days
ago and he is now just stuffed up. In the last 48 hours he has begun
discharging a lot of yellow/green muscous from his nose.

In the beginning I had to force feed him with a syringe. He is now
eating slightly over a can of Hill's Prescription Diet each day with my
encouragement (no force feeding, but he won't he on his own). He still
is not drinking water on his own, but the vet said I shouldn't be
concerned about dehydration as long as I get the prescription food into
him as it contains about 80% moisture.

He saw the vet 48 hours ago right around the time he began discharging
from the nose. During his last visit he tested negative for both FIV
and FELV. The vet suspects a rhinovirus (herpes infection).

Bogart finishes his antibiotics tomorrow and is still running a fever.
I have read it can take several weeks to recover from a URI, but should
the fever persist this long? How concerned should I be for the life of
Bogart if I continue ensuring he is receiving as much nutrition
possible?

If you could email me your response it would be much appreciated.

Thank you!

Trevor