Sick Diamond Dove

[beatrix1]

Hey guys,
Newbie here

I have a sick Diamond Dove and would appreciate any help or advice given.
I have had two Diamonds for about ten months and they have been well only problem was male kept pecking the females head at the back during mating which left her red and very sore,this was treated and then we split them up as it kept happening,they are in the same cage just mesh across to keep him from pecking.
The female has been puffed up the last week and sitting in her bed,wasn't sure if she was nesting and she was eating and drinking by herself.
Yesterday she looked of balance and i examined her to find a large amount of feathers around her private parts and under her wing missing and lumps of dried poop hanging from the remaining feathers,she didn't put up a fight and was breathing rapidly,i found your site and have given her salt and sugar water,some pro biotic and have bathed her then i moved to her to a small home with a hot water bottle and plenty of soft wadding and wrapped the side in towels,i keep changing the hot water bottle to keep it warm as i do not have a heat lamp,i have also fed her some boiled egg and her seed and have managed to get plenty of fluids into her by hand.
She is responding really well and the change in her since this morning is amazing....what do i do now guys? do any of yo know what may be wrong with her?
Thank you in advance x