I noticed that one of my birds looked like she was trying to push something out and there was a bulge right behind her vent. I thought she might be egg bound so gave her a warm 15 min bath. During the bath her bulge got larger and she started pushing harder. After I dried her off she was not pumping as hard and bulge stayed the same size. I pushed gently on the bulge and it felt like there was only air inside. I have been watching her for couple days now and tonight I noticed that now other places in her body look like they have air filling them and she is pumping harder( the two days before tonight she looked the same as she did after the bath). a few other birds look like they might have the beginning of the same problem. Does anyone know what is going on and what I can do to help theses birds?!!