Feline Upper Respiratory Infection: Welfare in Shelter Populations

Feline upper respiratory infection or cat flu is endemic in rescue populations and poses major welfare challenges in shelter environments.

Key Facts

Feline herpesvirus type 1 and calicivirus cause most cases of feline URI in shelter populations
URI spreads rapidly in densely housed shelter populations, potentially affecting all cats
Affected cats show sneezing, nasal and ocular discharge, lethargy, inappetence, and fever
Herpesvirus establishes lifelong latency; stress triggers recrudescence throughout life
Vaccination reduces severity but cannot prevent infection; housing management is critical

Welfare Considerations

Feline URI causes significant suffering in affected cats: nasal congestion, conjunctivitis, oral ulcers, and fever collectively impair the ability to smell, eat, breathe, and interact normally. Kittens with severe URI can deteriorate rapidly and face a significant mortality risk. The chronic shedding of recovered carrier cats means shelters must manage the tension between preventing isolation-induced psychological harm and controlling disease spread. High-quality shelter medicine including appropriate vaccination, housing design to reduce disease transmission, and prompt identification and treatment of sick cats reduces both disease burden and welfare impacts. Progressive shelters using community cat programmes and foster networks reduce shelter density and disease transmission.

What You Can Do

Support shelters with strong vaccination protocols and disease management practices
Consider fostering cats to reduce shelter density and disease transmission risk
Adopt rather than shop for cats to reduce pressure on rescue population numbers
Understand that URI is common in rescue cats and can be managed with appropriate veterinary care after adoption