A sudden change in a cat's behavior, especially aggression towards visitors, usually indicates stress or fear, or sometimes even an undiagnosed medical issue causing pain or discomfort. First, rule out any underlying medical problems with a vet check-up. If medically cleared, consider recent changes in the home environment, presence of stray cats outside, or even a negative past experience with a visitor. Cats communicate stress through hissing and swatting. It's important to provide safe hiding spaces for your cat, introduce visitors slowly, and use positive reinforcement. Pheromone diffusers can also help. Speak to Dial A Vet via a video consult should you need further guidance.Clinically Approved Standard by Dial A Vet Veterinary Team
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