I just ordered one of those ultrasonic pet safe no bark devices to keep at the office...I take both my babys to work with me and everytime a customer comes in Gucci the smallest one goes crazy barking. We tried the no bark device and it doesn't seem to bother Taz ...but Gucci will run and hide in a corner and shake for an hour after it sounds off...Why is she doing this? Could the ultasonic sound be hurting her ears or is she just scared? It says it is completly safe for animals...Please help!!!! I want her to stop barking...but I don't want to see her scared to death or hurting!!! What do yall think I should do?