Cats can eat stink bugs, and stink bugs are not toxic or poisonous to cats. However, eating stink bugs can cause some digestive irritation, such as drooling, vomiting, diarrhea, or abdominal discomfort, due to the bugs' smelly secretions and hard exoskeletons. The secretion can also cause temporary irritation to a cat's eyes and mouth. There is also a risk if the stink bugs have been exposed to pesticides, which can be harmful to cats. Usually, eating one or two stink bugs causes only mild symptoms that go away on their own, but consuming many could potentially cause more serious issues like gastrointestinal blockage requiring veterinary care.
In summary, while cats can eat stink bugs without lethal risk, it is best to monitor them for signs of irritation or illness and prevent excessive consumption.
