Have Cat Questions? Ask a Cat Vet Online.
I am sorry to hear you are worried about Sweetie Pie. I am a veterinarian and will do my best to help.
Scratching the ears can be a sign of an allergic reaction. I see she is on the hyperthyroid food; was she also started on methimazole(medication for hyperthyroidism?). Methimazole makes some cats scratch their face and ears.
A diet change can also cause allergy/ itching of the face and ears.
Let me know what else I can answer or help with.