1 year old budgie female appears to be losing its sight

by Louis McKay
(Long Beach, Ca. USA)

I have an aviary with 5 budgies all female and 3 zebra finches, the aviary is 19'x15'x 9'high. There are a lot of plants in it. Today I noticed my bird stagger,she was on a table and I walked over to her and she acted as if she didn't see me, (very unusual because normally I couldn't get near her)

She keeps looking around as if trying to figure out where she is. When she flys it appears as if she can't see where to land. She has lost some weight. I put her in a cage by herself, I think she is getting thin because she can't see where the food is at.There are no cuts or damage to her body that I can see, her feces appears normal.Her cere is clear, no mucas.

Overall her appearance is that of a healthy bird. She is able to perch but she doesn't balance very well.I feed them "Wild Harvest" Daily Blend.