Cats may get feisty for a variety of reasons, including:

1. Playfulness: Cats are natural predators, and they love to play. They may become feisty when they are in the mood to play and want to engage in activities like pouncing, chasing, and swatting.

2. Boredom: If a cat does not have enough stimulation in their environment, they may become bored and restless. This can lead to them becoming feisty and engaging in behavior like scratching or biting.

3. Frustration: Cats may become feisty when they are unable to achieve something they want, such as a toy that is out of reach or access to a favorite hiding spot.

4. Fear or anxiety: Cats may become feisty when they are frightened or anxious. This can be a defensive reaction to a perceived threat or an attempt to establish control over their environment.

5. Medical issues: In some cases, cats may become feisty due to underlying medical issues such as pain, discomfort, or illness. It's important to have your cat checked by a veterinarian if you notice any sudden changes in behavior.