wow!! Glad he's feeling better.
Something similar happened to my little guy about a year ago. He goes absolutly nuts when he see's his pellets every evening, he eats them like he has never been fed before. This one evening he gobbled them down so fast that he was choking on them. The same thing happened to him he was acting like he was trying to get something up and had mashed pellets coming out of his nostrils, along with a lot of clear phlem. It was really scary!! We just gently kept massaging his throat to get the pellet to move through,we felt the pellet poking his throat. Scared the heck out of his mommy, ever since Isoak his pellets in water, just long enough for them to absorb some of the water, they are easier for him to eat and mommy isn't a nervous wreck everytime he eats his pellets now!