Hi, My dog( Maltese) drools profusely for the initial couple of hours while traveling in our car. Drooling settles down after a couple of hours. Is there a medicine to control her drooling. I was under an assumption that she’s anxious or like humans she has motion sickness. Would like to know if I’m wrong and if I can help her with anything like medicine or tonic to help her that be would be great.