Hill's Prescription Diet z/d Food Sensitivities - cat dry food

I have a cat with IBD (an autoimmune disease that causes inflammation in the intestines due to allergies to certain proteins). My vet prescribed this food, and with a STRICT diet (NO CANS, TREATS...) my cat has recovered and we’ve been able to stop the cortisone. It doesn’t say so on the packaging, but it actually contains a bit more than the minimum recommended amount of Taurine (1,970mg/kg). In terms of ingredients, Hill’s ZD has everything a cat needs to stay healthy.