EmerAid Sustain HDN Feline is a powdered recovery diet formulated for cats that are underweight, transitioning out of critical illness, or managing ongoing digestive challenges. The formula combines hydrolyzed proteins, low levels of carbohydrates, essential amino acids, chelated minerals, and balanced electrolytes to support digestion and hydration. It carries a neutral pH and contains no artificial colors or preservatives. The powder is reconstituted with warm water into a smooth mixture that can be offered as a gravy topper, rolled into small bites, or drawn into a syringe for assisted feeding, including through small-bore feeding tubes. It is intended for use in cats of all life stages and can serve as a sole diet or as a supplement alongside regular food. Any fresh mixture should be prepared just before feeding, with unused portions discarded and the container kept dry between uses.