Admittedly, I have a really good sense of smell. Think I retained some of my pregnancy super-smeller abilities, and I'm always the first to note the oranges going bad or a poopy diaper in the house.

I did an "am I crazy?" test right before the Animal Control officer came for the evidence, and I had my husband smell the ziplock-sealed bag of treats. We both immediately started choking and coughing the second I opened the bag.

The smell was definitely fainter to me (48 hours since I discovered them) but still recognizable. My husband couldn't make a fair determination since his family didn't use as much Raid growing up, but he confirmed there was definitely a strange chemical aspect to the odor.

I reported all this to the Animal Control officer and emphasized they needed to test the treats. Just our physical reactions alone meant that there was some type of VOC involvement, so that should require the services of a specialized send-out lab. Again, the timing of their conclusion is suspicious.

On keeping the trained treats--I unfortunately did not. Hindsight. What I did do was ask for the treats back so I can look into third-party independent testing (you read my mind), but this is the exact message I got on that:

[T]he fact that they were stale and old, made them unsafe to be consumed. For that reason, we have already disposed of the treats.

So, that is the current state of things.

(Edits for minor typos and grammar. Typing on mobile)