Is it normal for my cat to lose whiskers?

Yes, in small numbers. Whiskers shed and regrow on their own cycle just like fur does, so finding one or two on the floor now and then is completely normal and not something to act on. What is not normal is several whiskers falling out at once, whiskers that look broken or snapped rather than shed at the root, or bald patches where whiskers used to be. That pattern points toward a skin condition, an allergy or, in rare cases, a nutritional gap, rather than routine turnover. Never trim a cat’s whiskers on purpose, since they are a genuine sensory organ, not just hair.

When to call a vet: Multiple whiskers lost at once, or whiskers that look broken rather than shed, are worth a vet check.