For an 11 week old dog, he should be eating three times a day. What kind of food is he on?
Also, you can hand feed him one meal a day, to slow him down. If you want him to eat out of the bowl, leave the bowl on the floor and put a handful in at a time, but don't take the food he can see away from him.
At that age he usually won't chew anyways, cuz his molars aren't big enough to crunch it.
You can let it soak in water for a while so it softens up and that may help.
However if you have him on a quality puppyfood, the manufacturers take that into account, and make it easy to digest even if it isn't chewed.
Take a look at the other end of him, if things seem ok there....then don't worry.