How to tell if a cat is about to give birth: 8 signs For cat owners, cat giving birth is a very important thing. If a cat gives birth improperly, it will have a great impact on the health of the cat. Therefore, cat owners should pay attention to some signs to determine whether the cat is about to give birth. Here are 8 signs that your cat is giving birth. Sign 1: Behavior changes Before a cat gives birth, her behavior will change significantly. They will become quieter and their desire for human companionship will become stronger. They will become fierce or leave people and go to more hidden places.