Advice needed with ex bats

We have had our 3 ex bats for 4 weeks now and at first one was a real bully.  Then things settled down.  This morning we woke to find that the 'oven ready' who was growing feathers nicely had lost some of her feathers down her neck and front and was bleeding.  We have sprayed her with purple spray, but are very concerned about putting them to  bed tonight. Other than separating her, does anyone have any ideas why this should happen now when we thought things were settling down.  Other than this they seem really happy and get really really excited when we give them grapes. They have been laying everyday since we got them, somedays we get 3 a day.

there is the other recent post from Roughlee with pictures from The Sun

I saw it suggested somewhere that you can cover the pecked areas with duct tape. Just stick it to the surrounding feathers not the skin, and new feathers grow underneath and eventually it falls off. Never tried it, but it would protect the damaged area from more pecking.

Hi thanks all, sprayed poor thing with 'purple spray' and this does appear to have done the trick.  The three do seem to have settled down now and less pecking if any at all.  They love the garden and get very excited when we come in.  I think they are great!