This is normal! Maia is a burping, hiccup queen! I am always saying "excuse you" or patting her back, especially after she eats! It's healthy for them to do this, as long as its not excessive, its a good sign of normal digestion.
Both of mine used to get hiccups quite a bit when they were little, Radar especially! Quite funny to watch Nothing to worry about unless it happens all the time or is accompanied with other symptoms of ill health.
Mine are going on 10 months now and although the hiccups aren't as frequent as when they were younger, every once in a while one of them will jump in my lap and will have the hiccups. Doesn't seem to phase them though.........both of them just sit there with their eyes closed.