I ordered the one product Anna recommended—the Wag&Whiskers™ diffuser. Same thing they use in Sweden, just marketed for America.
$35. That's it.
It arrived on a Tuesday. I plugged it in where Maxwell usually had his panic attacks. No smell. No complicated instructions. Just plug in and wait.
Day 1-2: No change. Maxwell still panicked. (I was ready to give up. Another failed solution.)
Day 3: Something shifted. He only howled for 45 minutes instead of 3 hours.
Day 5: I watched on the camera as Maxwell went to his bed and... laid down? While I was gone?
Day 7: The day I'll never forget.
I left for work. Watched the camera from my car. Maxwell whined for maybe 30 seconds, then grabbed his toy and went to the couch.
He slept. The entire day. Like a normal dog.
I sobbed so hard in the parking lot my coworker thought someone died.