My mother is 106 and suddenly started refusing solid foods. She spits them out. We have begun to blend and puree everything and that seems to work well. However, we want to try and add a protein supplement to add to her food. What is the most palatable, nutritious and safest one on the market? There are so many that it is confusing. Whey protein best? Thanks for help. Mom will be 107 in November by the way. She is very healthy but not mobile anymore, so we have thre paid caregivers as well as my sister and myself to care for her. We want to keep her as safe and comfortable as we can until she leaves us.