Have Cat Questions? Ask a Cat Vet Online.
Good Morning and welcome to Just answer. I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
Feline Herpes can be mistaken for allergies because of the similar symptoms. In cats, this will usually show as ocular discharge from one eye that is brownish and is a result of stress. There is a test called PCR that your vet can run to determine if this is the case. If this is Feline Herpes, this is treated with anti virals as a topical application to the affected eye. Allergies are usually treated with a triple antibiotic that has a steroid in it to resolve these symptoms.
Here is a site with more details:
Sincerely, XXXXX XXXXX