For “acute”, sometimes traumatic, events that are difficult to predict, we recommend you give a double dose two hours before the event and, if necessary, repeat the dose four hours later.
Travelling by plane is very stressful for pets (they’re put in a carrier, separated from their owner, in the hold all alone), so if your dog has to take a flight we recommend you double the dose of Zen Supp™ two days before departure and repeat the dose when you put him in his carrier. If in doubt, don’t hesitate to ask your vet for advice.