Does anyone know how long it takes for RESCUE REMEDY to have an effect? My basset still goes CRAZY when at the vet to get ner nails trimmed! I got some of this stuff to help her. She is 55lbs. Does anyone use this--and how long before the appt. should I put about 4 drops on her tongue? Thanks so much for your help! I know, I know--I'm a "wuss."