Dogs received either a placebo or CBD capsule (~4 mg/kg bodyweight) within a Royal Canin® Pill Assist pocket, with their morning meal. Hemp-derived distillate and placebo oils were acquired from Canopy Growth Corporation (Ontario, Canada) and processed by Kazmira LLC (Colorado, USA). The distillate was diluted with a food-grade sunflower oil and manufactured in soft gel capsules (bovine origin; RNA Corporation, Illinois, USA). Capsules were then analyzed for potency and purity as previously described (40 (link)), finding only trace amounts of non-psychoactive cannabidivarin (0.004 mg CBDV/mg of CBD) in a small number of capsules, and no detectible THC or other cannabinoids. The placebo soft gel capsules were manufactured to match the conformity of the CBD-containing capsules, minus the CBD, to maintain the blinding of the study. Two hours after placebo/CBD administration had been confirmed, dogs were exposed to either the separation event or car travel.
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