Thank you so much for your kind comments!
A quick update:
Hazel is acting more herself,
and she is eating almost normally.
I am relieved.
She's still approaching chaffhaye very delicately,
mouth barely touching the chaffhaye,
but managing to eat at least half her ration, eventually:
And for comparison, here is mum Azalea,
demonstrating the typical full-muzzle-pushed-into-palm approach:
Hazel is also eating hay and treats,
so definitely feeling better.
I still don't know what happened to her mouth,
but hopefully she'll be 100% soon.
~~~~~