I would suggest that you visit the Miracle-Mineral-Supplement debate forum and find member Biosafe. Send Bruce a private message. Bruce has worked with people treating birds and should be able to tell you what works.
As Jon has indicated, the 28% sodium chlorite solution is most likely too strong for this application. The 5% solution may also be to strong, but I don't know for sure.
Through dilution, you can change the concentration of the solution. This will allow you to convert the 28% solution to whatever is needed for your bird.