What is Pax thinking about the meals he has had in Chapter 23?

Pax is think that only three times in the week and a half since his humans left him had he eaten enough to fill his belly. His last meal, a pile of fish rotting on the bank, he had thrown up shortly after eating. The ham he had gotten at the camp, he had given to Bristle and Runt, and he did not eat any of it.