I have only had my Penny for 2 weeks but I have noticed she gets nervous and shakes the first time we do something or go somewhere new so I try to make a point to do the same thing a short time later and she seems fine with it the second time around. The first time I took her to my moms she trembled and whined the whole time. I took her back the next day and she acted like she owned the place. Did the same thing at the pet store.