Originally Posted by
sintea
Don't fully trust the 'order/number of things to feed' listings the calculator pages provide, you have to keep feeding your horsebird the same thing until "Your chocobo is growing new feathers." pops up to tell you that you actually are progressing the color change, and then switch to the next color fruitveg.
I've before dyed my chocobo not being aware of that pop up being a thing so I ruined quite few attempts at going for specific color, but after I learned of that detail it upped the chance of getting the targeted color by a lot if not 100%.