volume

Hi there, I am adopting an 8wk old SC cockatoo and wanting to know the ideal frequency and volume at which a commercial formula+probiotic should be fed? The current owner says the bird has about 50-60mL of this 5 to 6 times a day but this seems an awful lot to me? Thanks, Grace

So as you may know, I own a Red Bellied poi, which is highly regarded as the quietest parrot (which of course is still loud, but volume wise they don't get too bad at all). My wife is very interested in buying a Hahn's Macaw, but I'm concerned about the difference in volume. Obviously, two...