When Your Cat Reacts to Protein — Any Protein.

Food allergies in cats can be genuinely frustrating to diagnose — they often show up as chronic itching, skin issues, vomiting, or loose stools, and identifying exactly which protein is causing the reaction can take months of careful elimination dieting. Hill's® Diet z/d® bypasses that challenge entirely: rather than switching to a novel protein, z/d® uses Hill's Hydrolyzed Protein System™ to break proteins down to a microscopic size that the immune system simply cannot recognize as a trigger.

The result is a food that's appropriate for cats sensitive to virtually any protein, making it both a powerful diagnostic tool and a long-term management option.

How It Works

• Hydrolyzed Protein System™ — proteins broken down to minimize immune recognition
• No intact animal protein — removes the most common food allergens
• Single, highly digestible carbohydrate — reduces GI workload
• Omega-3 and omega-6 fatty acids — help nourish and soothe irritated skin
• Antioxidants — support skin barrier and immune health

Who It's For