My older dog definitely knows when I'm on L because I give him some too. All started out by accident, when he was just a pup. I was camping on the Big Island of Hawaii with a bunch of real cool kids, one of them had a grip of double-dropped sugar cubes. I had a cooler with ice. Bro asked me if I wouldn't mind if he put his ziploc bag in my cooler, as we all know that light and heat degrade the chem. By all means, good Sir.
Turns out the baggie had a hole in it. Cubes mixed with ice and water in bottom of cooler. Filled up puppy's bowl with the little drain button on the bottom of the cooler, didn't know about the bag situation yet. Hour and a half later he ambles up to me with eyes the size of pie plates and stares through the back of my skull, gives me a big wet smooch, then rolls around by the fire making monster noises. Seemed to really enjoy himself. Ever since then when I've been able to find Miss Lucy I share with my fuzzy pal.
Also during the 5 years I lived on Big I, Molokai'i, and Maui, he smoked more outdoor organic Kind with me than most people on the Mainland have ever seen.
Damn I miss home.