I am sorry he is having problems already. Food and water are not optional here. Its required. Eating will become much more difficult. As a caregiver its your job to do your best to gel calories and water in him. 2500 cals and 48 oz of water is safe zone, more is better. At two weeks, taste is all but gone. He will get over it as we all have. Have lots of Ensure, Boost around and keep pushing it on him. He must swallow as long as you can into treatment. Try diferent techniques, begging, pleading, yelling what ever it takes. As for the peg. Fully discuss this with the RO now. It takes a week or so to get. Have every thing in place incase he needs it. Most of us do.

Good luck and keep us posted. More will chime in and offer suggestions.