Noah, what a rascal he is!
I'm sure he has every idea of how to outsmart his diligent mum
This sounds odd, but have you ever tried serving a veggie with something "junky"?
Like millet, for example. Mallorn hates boiled egg (she likes scrambled only, don't ask why, I have no idea) but if I mix millet into it, she grudgingly will eat it.
Also, maybe he'd like a "smoothie" of sorts--more of a puree than a liquid, if he doesn't fancy his gourmet juice
Other than that, I'm fresh out of ideas--those silly birds, they always outsmart us, don't they?!