sick finch

Question
Hi
I rescued a finch that someone wasn't taking care of.  I've only had it a week.  I introduced 3 new finches to keep him/her company and (s)he became sick 2 days later.  I thought (s)he might be egg bound but I'm not sure because I'm not sure about it's gender.  I tried to look it up online.  It is a black cheek zebra finch that has all the markings of a male with the black cheeks...but I read that some black cheek females look very much like the males.  Anyways, the finch has been unable to perch or even stand up.  When (s)he tries to stand up (s)he tips over onto her/his back.  I had to flip her/him over because of heavy breathing and finally wedged him/her with small towels to keep it from happening again.  It's now in a small cage and is eating constantly and drinking water.  I have tried all the suggestions I could find concerning egg binding...heating pad, steam/humidity, oil on the vent, etc and the bird is still in the same condition.  (S)he seems to struggle a lot when pooping, pressing his/her back side up against the cage with tail held high...and the poops are mostly white. What do you think the problem is?  Could (s)he have gotten an illness from the new birds? Could this be a female that is egg bound even though it looks just like a male?  Thank you for your input.  (S)he has been in this condition for almost 3 days.  I'm afraid the last owner wasn't taking proper care of it and it is nutritionally deficient.  I've been trying to give her/him lots of calcium in the form of egg shells

Answer
It sounds like something my birds had once. What caused it was a head injury of some kind. Check the back of your bird's head for blood pooling or anything else out of the ordinary. If it's an actual injury, the chances of recovery are low. The vet can prescribe something to help but even with that my little birdie still died.
The best I can offer is if there is blood pooling in the back, take her to vet. If there isn't, still take her and try and get something (no chloropalm or ivamech those both kill birds). Keep feeding her food high in nutrients and keep her as comfortable as possible. Sometimes all you can do is keep them comfortable until they pass on.