Right temperature, wrong species

While I was on the phone with our occupational medicine provider today, we got on the subject of the ways people try to pass drug tests. In case you didn't know, using a "clean" person's urine is one way. One of the procedures to guard against that is the temperature of the specimen is checked. If it's less than body temp, there's an issue. The provider told me this epic story, and I had to share. She said "I had one that was the right temperature but the wrong species." The sample was collected, and the temperature was within the acceptable range. However, when the lab analyzed it, they determined the sample wasn't from a human!

Bonus related story: I was telling my HR coworker about this. She said she had a candidate whose drug test was negative, and it also revealed the person was pregnant. The issue- the candidate was male. I had read about things like that happening before, but this was the first time I'd heard a verifiable story.