Bluesman, has a dietician been provided to you for help with determining how much Boost to drink? If not, ask the doctor who's providing care for the ALS to script for a dietician to come, at least once, to help you along with whatever your doctor might advise.
My father's Senior Center provided Ensure at a good price, lower than if purchased in a store. That might be an option if you need to conserve funds.
My father's Senior Center provided Ensure at a good price, lower than if purchased in a store. That might be an option if you need to conserve funds.