Cats cannot eat yeasted cookie bread. Sourdough cookie bread contains some additives and preservatives that may irritate your cat's gastrointestinal tract. Moreover, the sugar content in human food is also high, and some biscuits and breads may also contain xylitol, which can be toxic to cats. So it’s best not to feed fermented biscuit bread to cats.

What foods cats cannot eat:

1. Beverages containing alcohol. Alcohol will be absorbed into the cat's blood. If the cat drinks alcoholic beverages, it will cause vomiting, diarrhea, difficulty breathing, and in severe cases, the cat may fall into a coma or even die.

2. Seaweed and bonito flakes. This type of food contains a lot of minerals. Calcium, magnesium, phosphorus and other minerals are the culprits in causing urethral stones in cats, so try not to give this type of food to cats.

3.Chocolate. Theobromine and caffeine in chocolate can cause poisoning in cats. If a cat eats chocolate, it will develop digestive tract and other diseases, and in severe cases, the cat may die.