Check the listing for details. FCV Protect Granules for Cat Respiratory Problems. Color: See Description, Condition: New, Made in US. Listed at 43.50 USD. Natural Treaent for Symptoms of Feline Calicivirus (FCV) FCV Protect™ is a safe, effective, non-addictive natural remedy made of 100% homeopathic ingredients. Formulated by our team of experts in natural medicine, FCV Protect™ helps to temporarily relieve symptoms commonly associated with feline calicivirus (FCV) such as sneezing, nasal discharge, watery eyes, and respiratory discomfort in cats and kittens. FCV Protect™ is a powerful homeopathic formulation for addressing eye and nasal discharge and respiratory problems. Using a unique, proprietary blend of highly diluted natural substances, FCV Protect™ helps to relieve symptoms like loss of appetite, muscle and joint lameness, and blocked sinuses. It is made completely safe for kittens and pregnant queens with no risk to unborn kittens.