You will probably be better off sticking with dry nugget food during the trip. Have some Nutri-Cal (Nutri-Stat) on hand and give him a dab (1/4 teaspoon or so) once or twice during the trip. A 1/2 liter bottle of spring water will probably be enough, but bring an extra for "just in case".
:I will be travelling from CT to CA by air with my 11 week old male puppy under the seat in front of me. He is paper trained (wee wee pads). Changing planes in SLC. It will be a long flight. Any suggestions/tips for travelling re food & water?