Yes, it's safe for cats to eat cauliflower in moderation. While our feline friends are primarily meat-eaters, they've been known to snack on certain veggies from time to time, and cauliflower is a safe, healthy option.
Cauliflower has a number of nutritional benefits for cats. It's rich in minerals, rich in fiber, and rich in essential vitamins like vitamin K and C. All of these nutrients have a positive impact on your cat's overall health. The vegetable's fiber, in particular, helps your cat's digestion by preventing constipation and diarrhea. At the same time, the vegetable's high fiber content means that eating too much can actually CAUSE gastrointestinal distress, so only feed your cat small amounts at a time.
Unlike dogs, cats have a tough time digesting raw cauliflower, so make sure to cook it first. And don't add any butter, oil, salt, or other seasonings, as these could make your cat ill. And some foods that are commonly added to cauliflower, like garlic and onions, are actually toxic for cats.
Despite its numerous health benefits, cauliflower should never make up too much of your cat's diet. Cats need to get most of their nutrients from meat-based protein, and cauliflower certainly isn't meat (and doesn't contain much protein to speak of). Vegetables like cauliflower should never displace the meat in your cat's diet. You should only feed them cauliflower in moderation, as an occasional treat.
As always, before introducing a new food item into your pet's diet, consult with your veterinarian first! If your cat eats cauliflower (or any food) and is showing signs of illness such as lethargy, diarrhea, or vomiting, reach out to your veterinarian immediately. If your pet requires veterinary care due to something they ate, pet insurance can help cover the cost of treatment.