A nutritionally complete and balanced vegan diet for cats would require the use of specially formulated, high-quality plant-based protein sources, fortified with essential amino acids, vitamins and minerals. This diet would have to be carefully formulated by a veterinary nutritionist and monitored by a veterinarian to ensure that it meets the cat’s nutritional needs.

It’s important to note that even with a well-formulated vegan diet, it may not be able to fully provide all the nutrients that cats need, and cats may still develop health problems if they do not receive the proper nutrients. Therefore, it’s crucial to consult with a veterinarian or a veterinary nutritionist before putting a cat on a vegan diet.

Overall, while it’s theoretically possible to create a vegan diet that meets a cat’s nutritional needs, it is not a common practice, and requires the specific food formulas to provide a nutritionally complete and balanced vegan diet for cats, so it’s important to consult with a veterinarian or a veterinary nutritionist before attempting to put a cat on a vegan diet.