Can I be suspended or terminated as cook in nursing home over patient recipe misunderstanding?

I am a cook at a nursing home facility.I was phoned at home by my manager and a human resource representative concerning a recipe for a protein cereal that I was not given.I have been using a different recipe for months and my manager was aware of this.I am being told I am fully responsible for weight loss in some of the patients.I feel my manager as well as the facility dietician have a responsibilty in overseeing and insuring the patients are provided the nutrition they required by the state.I was told not to report to work as an investigation is being made.