I've totally given up with Gypsy. I used a dog whistle and she was scared shitless of it. She did learn to associate the whistle with treats (as is the idea.... yay go Gypsy!) BUT she is now scared of treats so wont take them out of your hand... just cowers and skulks away.
Hi, my name is Clare and my dog is afraid of food. <--- closest thing I could find to a facepalm