How can I tell if my cat has an allergy?

How can I tell if my cat has an allergy?

Bernadine D. Cruz. DVM (Companion Animal Medicine Expert, Laguna Hills Animal Hospital ) gives expert video advice on: What are the warning signs that my cat needs to see a vet?; What is the best way to transport my injured cat to the vet?; What do I do if my cat swallows poison? and more...