Hello Lori Ann,
My husband is 6 years post treatment for tonsil SCC with spread to 2 nodes. He's doing well now. Like your husband, he was thin even before the cancer. He resisted the Peg tube way too long - didn't end up getting it until the last week of radiation. It really, really helped the whole situation. As someone else stated, with the Peg, taste issues go away. Do you have a dietitian/nutritionist on your team? They can help you find some Ensure-type products that are even higher in calories - Nutrasource was the one we used (purchased through a catalog that the dietitian gave us).
Don't let the addition of chemo alarm you. That is common these days - it wasn't part of the protocol when my husband was starting treatment and we had to insist on it.
You have found a great place to get lots of help and support as you go through this.
Best to you and your husband.
Anita