Why call a vet immediately if your cat has true-lily pollen on its fur, even when it looks well?

Answer: Grooming can turn pollen into a dangerous dose

Looking well rules out a serious exposure — Serious kidney injury can develop after an initially normal appearance. Do not wait for symptoms before seeking veterinary advice.

Grooming can turn pollen into a dangerous dose ✓ — A cat can swallow pollen while grooming. Contact a vet or animal poison service immediately, prevent further exposure and do not try home treatments unless directed. This warning concerns Lilium and Hemerocallis; other plants called lilies have different risks.

Only a swallowed leaf could cause harm — With true lilies and daylilies, pollen and vase water can also be dangerous to cats. A whole leaf is not required.