Feline Hills cd Multicare Urinary Stress Health/ Tract Health helps manage stress with L-Tryptophan and Hydrolyzed casein. Clinically tested to dissolve struvite stones and reduces risk of calcium oxalate and struvite stone formation. Rich in fish oil - an excellent source of Omega-3 fatty acids - to help promote healthy skin and a shiny coat. Controlled sodium, magnesium, and phosphorus levels for bladder health. Antioxidants to promote a healthy immune system. Ideal for long-term feeding and multi-cat households.