My dad hs just been diagnosed with lung cancer, but because he has thrush in his mouth he's not eating much be a use the food doesn't taste very nice. I'm worried that he won't be able to go for treatment because they have said we have to build him up first and now to cap it all he's got a lung infection. I know he's 79 but I just don't know how to get rid of this thrush or  how to get him to eat. Please help. Thank you. Andrea