What the letter codes mean
Prescription Diet uses two-letter codes rather than names. Each letter is a mnemonic for what the diet is for:
- c/d Crystals, for urinary health and struvite management
- d/d Dermatology, for food sensitivities and skin
- i/d Intestinal, for digestive and gastrointestinal problems
- k/d Kidney, for renal care, with a separate Early Stage version
- m/d Metabolic, for weight and glucose management
- t/d Teeth, for dental care
- y/d For thyroid care
- z/d For food sensitivities, using hydrolysed protein
Metabolic and Gastrointestinal Biome are named rather than coded. Match the code on your vet's note exactly, because similar-looking codes are entirely different foods and c/d Multicare and c/d Urinary Stress are not interchangeable either.