Hi Sarah,
I too have some issues when eating due to a narrowed throat opening and loss of my parotid salivary gland from the radiation. I also lost the ability to swallow during treatment and had to relearn how. I've developed a pretty good technique though and am now able to eat anything I want. There are a couple of keys to this technique:
1. Take small bites and chew the food all the way down to a liquid state. A meal lasts forever like this and I usually get tired of eating before I can get too full, but it works. Waiters in restaurants get a little impatient when you linger over the meal but so what.
2. Take a sip of water with each bite an swish it around to keep the food moist. I also take a small sip to swallow the food as if it were a pill. You have to try to swallow small bits rather than the whole mouthful. Also, choose moist foods or else have more liquid on hand if the food is dry.
3. Relax. I've found that when I thought I was going to choke I had much better success if I just calmed down and didn't panic. It takes some practice to do this but it really made all the difference.
4. Have my wife standing by to Heimlich me if I need it. I haven't as of yet and we both hope I never do. If you are out at a restaurant it's also helpful to know where the bathrooms are, just in case.
All of this stuff took me months to work out but I'm getting better at it everyday. Practice makes perfect. I love food and enjoy eating again. I hope the same for your husband.
Good Luck!
Joe