How is it collected in the first place?

TAMPA, Fla. - Cynthia Hunter spent almost two months in jail over a vial of cat urine. Hunter, 38, was arrested Aug. 15 on a charge of petty theft after she was accused of stealing from a Wal-Mart store.

Deputies added charges of possession of a controlled substance after finding a vial containing a yellow substance in her purse. A drug field test suggested the substance was methamphetamine, The Tampa Tribune reported.
Hunter had protested, saying the substance was dehydrated cat urine for her son's science project and that it had been purchased at an animal clinic. She was released Thursday after lab tests found the substance was, in fact, cat urine.