My bird is changing colour
I have a 10 month old Parakeet who was completely blue when I first got her in August at 4 months of age. Recently in the past 2 months she has started to get grey spots through out her body. I took her to the vet last month and she wasn't sure of what might be causing the greyness. She did say that my parakeet was lacking vitamins and minerals in her diet so I bought a mineral block and vitamin supplement to put in her water.
The vet said to wait three months and her colour should go back to normal. It's been one month now and she seems to be getting more grey and it seems to be getting darker. Other than her colour change, she is completely normal. She's eating properly, her feces are normal, she chirps and sings and shes responsive. I am worried that the grey might mea shes internally ill or something because her vet said this colour change was very unusual. Please advise me as to what might be making her change her colour.