Yes! I ordered the supplements I mentioned from Amazon and they've been great. Chewy has them, too.
https://www.chewy.com/naturvet-senior-advanced-calming-aid/dp/243205?utm_source=google-product&utm_medium=cpc&utm_campaign=12791146288&utm_content=NaturVet&utm_term=&gclid=Cj0KCQiAxoiQBhCRARIsAPsvo-x4tw2KIS5WztE39vKAa9BsbcpHKIoIAzoZ9wxzhDDDcoKAz5YHwVIaAjVaEALw_wcB
I give him a good-sized treat, 4 of the supplements, and a small bit of water, then half an hour later he goes out and comes in for bed. He zonks out until 6:30 or 7, which is really something. He seems much more refreshed and less confused in the mornings. And I feel like a new woman.