Your DC won't eat due to teething.
I'm 99% sure it's teething. Gum is all swollen and looks like a tooth is about to pop through.
But DD 12 months the last 2 days had been extremely fussy with food.
Tried her with an assortment of things and she's only eating about 1/4 of what she was two days ago. Do you just keep offering and ride it out?