Cutting a cat's whiskers can have a range of effects on the cat. Here are some possible consequences:

Loss of balance and coordination: A cat's whiskers are an important tool for perceiving its surroundings, especially in confined spaces or when moving quickly. The base of the whiskers has a rich network of nerve endings that can sense minute air currents and objects in the surrounding environment, helping the cat maintain balance and coordination. If the whiskers are cut, the cat may lose this sensory ability, leading to unsteady gait, increased risk of bumping into obstacles, or falls.
Impact on hunting ability: In the wild, cats use their whiskers to measure the width of openings or gaps to determine if they can pass through. If their whiskers are cut off, this ability is impaired, making it difficult for them to accurately judge whether they can enter a certain space, thus affecting their hunting efficiency.
Psychological stress: For cats, whiskers are not just a physical tool, but also closely related to their emotions and psychological state. After their whiskers are cut, cats may feel uneasy, tense, or afraid due to the loss of this important sensory ability, and may even experience a stress response.