Celery can be a healthy and safe treat for cats when given in moderation (that is, if they're even interested in this vegetable). It contains essential vitamins and minerals that can contribute to their overall health, such as Vitamin K, folate, and potassium. As an added bonus, celery is low in calories and carbohydrates, which makes it a good snack for overweight or diabetic cats.
However, while some cats may enjoy the taste of celery, and others may not like its texture or flavor. In addition, overconsumption of celery by a cat can lead to digestive issues such as vomiting or diarrhea due to its high fiber content. Plus, as obligate carnivores, cats need to get the vast majority of their nutrients from meat-based foods.
If you do give your cat celery, give them small amounts at a time (raw or cooked, but plain) and take note of how well your cat's stomach tolerates it.
As always, before introducing a new food item into your pet's diet, consult with your veterinarian first! If your cat eats celery (or any food) and is showing signs of illness such as lethargy, diarrhea, or vomiting, reach out to your veterinarian immediately. If they require veterinary care related to eating unsafe foods, pet insurance can help cover the cost of treatment.