I tried with chocolate drops and meaty bits, but she just eyed the sweety and carried on hiding. I'll try it with the puppy who should be more confident and able to handle it- whilst strictly speaking not a rescue dog, Holly was very badly treated until the age of 8 weeks, when she was given to the people I got her from as a stud fee.
Oddly, her original breeder produced a number of good dogs- maybe he got old and stopped caring, because when the people I got her from saw the condition Holly was kept in, they got the other guy's license revoked and took over several of the dogs. As a result, Holly was very tiny- even by 12/13 weeks she was smaller than some 8 week old puppies, and she was always scrawny, although very healthy. To this day she remains hand shy around her head, and grooming her ears is difficult because she gets so distressed. Doesn't mind it anywhere else! Loud noises startle her, though she's leaps and bounds better than she was, and generally is a happy and surprisingly sociable little thing.
Anyway, I knew the voice control was an issue and all the more so for me since I am deaf (love the thought of flashlight training, BTW) so Holly was trained first to voice, and then to voice and hand signal- she now responds better to hand signals than to vocal commands, so clicker training per se isn't necessary, but she could do with some work on her recall and retrieve, and I hoped to use the clicker for that. Not if it upsets her though! Not worth stressing her for no reason.