It sounds like you're doing the right things. I do have a couple of questions, though, in case it might be something you can prevent in the future.
How many do you have?
How much space do they have?
Do they have plenty of hiding places?
What species? (coturnix, button, bobwhite, etc)
How many...
:welcome
I would pull her out for a day, then put her back in. Being alone for a day will not be pleasant for her, and will hopefully readjust her attitude. Let us know if that doesn't work.
Italians are usually lighter in colour. I'm not an expert on colours, though. Even in the six years that I've been raising quail the colour names have changed and a lot of new colours have been introduced.
Individual pics would help, but I see two dotted whites, two pharaohs, and two that look like tibetan. I'm not sure what the one in the middle is, but I suspect sparkly.
Bobwhite and gambels have pretty much the same dietary needs as coturnix and buttons. Here is an article that will help you find what you're looking for. I hesitate to recommend specific brands since you can often find good local brands that have all the nutrition that they need...
That's one of the reasons I'm not fond of AI. In addition to the inaccuracies and making people even less capable of thinking for themselves, the power and resource usage of the immense data centers needed to run it are incredibly resource and power intensive.