Any change to the flock, or to living conditions, will cause some degree of stress to poultry, inculding quail, and often this results in a temporary slowdown or stoppage in egg production, so as they have moved cages and are now living outside when they stopped laying, this may be part of the reason. It's been quite cold and miserable as well, so the younger ones in particular may have their systems 'on hold' dfor better weather. So long as bossyboots isn't actually pecking the others and injuring them, there's not a big problem with her being dominant, it's just a flock pecking order thing they have to learn to live with. Other factors that may affect egg production are diet and light levels. If one bird is laying regularly then probably neither is the cause in this case, but I expect you know that quails need 14 hours a day of good light in order to lay, and although the days are long enough now to provide this, if the cage isn't in very good light this may affect them, especially this dull cloudy weather we're having. A dose of brighter light might just tip them into lay, maybe. I've been boosting the light in my cages, so I can see the birds and it looks nice and sunny in there. I only have small LEDs which take minimal electricity and I've got them on a time switch to boost their 14 hours and they're all laying daily now I've started this. The other thing is diet - quail need a 22%+ protein level in their diet, and if you are feeding layers pellets these will on;ly have 15-17% protein. You might try supplementing with hulled sunflower seeds (25%) or mealworms or even chopped hard boiled egg, their own or hens egg (you can blend the cooked egg shell and all so they get the calcium in the shell.) Also they like daily greens, I expect you are giving them these, and cuttlefish bone is a good idea if you aren't giving layers pellets which have the advantage of providing the calcium they need for the eggs.