Hi there! We finally have an egg, the new food obviously helped, so thanks to everyone who answered and helped me out!
So, we've bought 3 more hens to balance out the ratios, and just because we realised we have space :D We have created a plan of action, please flag up anything you think is wrong with it or anything else we can do to ensure a smooth transition. We already have plenty of hiding places. We have 2 hens and a cockerel currently, so the new hens will outnumber old hens, if you don't count the cockerel.
1) Put new hens out in a cage in the airlock of the aviary during the day every day for a week, quail will be able to see and hear each other.
2) Assuming no-one throws themselves at the bars to kill each other, we will split the aviary into 2 with the cockerel in one side and the hens in the other, and put the new hens in with the cockerel at night. Old hens will be able to see and hear new hens and cockerel, but they won't be able to get to each other.
3) Once the new girls and the cockerel are settled, we'll remove the barrier and let them mingle with the older hens.
I figure that this will probably stop our current girls from laying for a couple of weeks. We hope that the introductions won't take any longer than 2 weeks, 1 week in the airlock and 1 week in with the cockerel. I also figure that once they're all in together there might be some scuffles while the girls figure out a pecking order, but that shouldn't last too long.
I'll really appreciate any input, especially if step 2 is not worth doing, because I'm worried that that might upset the hens we have now and cause more fights in the long run.
Thanks a lot