My father will eat a few spoonfulls at meal time and sometimes in-between meals. After a few spoonfuls he either spits out the food or clamps his mouth shut, even his favorite foods. He father developed a bacterial infection about two weeks ago and has taken antibotics for 10 days. Because the infection has not completely cleared, he will be taking the antibiotic for another 10 days. I believe there is some correlation between the infection/antibiotics and the loss of appetite. But at this point, I don't know what more I can do to encourage him to eat. I'm supplementing with Boost nutritional shake. But it's a fight to get him to drink much of anything.