I have a Nigi whether who is SO loud!!!
What works for me is:
Keep the hay net FULL so they can't use the excuse of "nothing to eat!"
AND
IGNORE them!
Every movement he heard when he first arrived he though people were bringing him grain BECAUSE in his other home, the barn and goat pastures were VERY far from the house, so the only time he did see people were meal times!
Here, his enclosure is very close to the house, so he was essentially programmed to think PEOPLE=FOOD.
I am just starting to break him of it now and it's been 3 weeks but he has a wicked internal clock and I had better not be late with breakfast or dinner cause boy I will hear about it (and so will the neighbors!)...
Sure is loud for a little guy!
Good luck!