Mini Dachshund won't eat

I have a mini Dachshund approximately 8 years old  and she refuses to eat. She drinks water and urinates also moved her bowels this morning She ate on her own 2 days ago today i fed a jar of Chicken Baby Food today She is not vomiting I had her to the vet no temperature. They did an Xray nothing laying in stomach but they said they saw a herniated disk they gave her fluids and a B12 shot and nausea medicine and antacid meds Still won't eat and just wants to lay and sleep

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