Do the females attack him? are they happy together? if they all reside in one cage. try separating the male from the females for awhile and check up on him to see if they grow back. he could just be depressed and might be pulling them off himself or the females could be doing that to him.
Feb 23, 2009
feather plucking by: Anonymous
Its not normal. You need to take him to an avian vet to rule out a medical problem. When my cockatiel started plucking I took her in and she had an infection. 10 days on an antibiotic and she quit. Her feathers haven't grown back yet but she isn't plucking anymore. She isn't bare but only covered in fuzzy down. A friend of mine lost her cockatiel two weeks after it started plucking. She is heartbroken because she didn't take him to the vet. Better to be safe than sorry.
