A. If the discharge is clear, this may be a mild self-limiting viral infection. Many cats have the herpes virus living dormant in the nerves around the face and head. In times of stress the immune system is suppressed and the virus replicates and makes the animal clinically sick.
You can stimulate his appetite by offering canned foods that you've warmed slightly in the microwave - this intensifies the smell and encourages them to eat. You can also flavor his water with a small amount of chicken broth or clam juice. Put him in the bathroom when you take a shower or run a humidifier to get some steam in the air and soothe his nasal passages. And you can use children's saline nose drops - Little Noses is a brand I like - to clean dried debris from the nose.
If the discharge becomes cloudy, yellow, or green, I'm sorry but this indicates bacterial infection and he needs to see a vet.
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