Sure as I said in my first message "unlike classic" so yes in classic if your pet kills something by itself you get no loot (it's because there is "aggressive" mode in vanilla/classic so you could leave your pet and come back 3 minutes later with a mountain of loot, if they didn't disable loot for pet only kills; but that's not possible in Legion/BfA (no aggressive mode) - admittedly maybe you could sit exactly in the path of a mob and let your pet kill it, not much gold/hour there)