“Veganism is a philosophy and way of living which seeks to exclude—as far as is possible and practicable—all forms of exploitation of, and cruelty to, animals for food, clothing or any other purpose; and by extension, promotes the development and use of animal-free alternatives for the benefit of animals, humans and the environment. In dietary terms it denotes the practice of dispensing with all products derived wholly or partly from animals.”

Nothing excludes the care of pets. It does exclude “animals for food” “as far as is possible and practical”. One could definitely extend this to animals for a pet’s diet, but I’d argue it’s not practical for cats because we don’t yet have solid evidence that says it’s safe. I just don’t think it’s rational to flatly liken it to torture.