Feline calicivirus (FCV) is one of the most common causes of upper respiratory disease and oral ulceration in cats. Understanding its welfare impact helps owners and shelters manage affected animals effectively.
FCV-related oral ulcers cause significant pain that interferes with eating, drinking, and grooming — essential activities for feline wellbeing. Affected cats experience discomfort with every swallow, leading to reduced food intake, weight loss, and dehydration. In shelter environments, respiratory disease outbreaks create a cycle of suffering, euthanasia decisions, and transmission that threatens the welfare of entire populations. Early identification and isolation of affected individuals, along with pain management, supportive care, and appropriate quarantine protocols, are essential welfare interventions. Reducing shelter crowding and stress significantly reduces disease burden.