I was wondering same when i got my samples with no instructuions for muesli and cereals
So I wrote a mail to them..thats the answer
"""" Hi Kerstin & Budge
You can feed the Muesli as is, no need for milk or water.
We do sell a wet food. Parrot Cereal, with this product you can add a little warm water, if you bird prefers a wet food.
If you have any other questions please do not hesitate to ask.
Kind Regards
Phil """""""""""
So Muesli dry, cereal CAN be wet with a little warm water
Hope i could help lol