Is Richard the only Hungry One?

I think that Richard isn't the only hungry person in this novel.  Richard is the hungriest by far, he is hungry for attention, knowledge, food, and in a way hungry for rebellion.  Richard immediately kills the cat when his father tells him so, and then tries to use the leverage that his father told him to, so he does not get in trouble, this is another example of how he is hungry for knowledge too, as he does not know what a dead cat will be like.  Then he tries to run away and leave the orphanage, and he doesn't want to have anything to do with the main caretaker. Also, quite literally his brother and mother are hungry.  I think that his brother is also hungry for attention, and his brother has a hunger for knowledge.  His mother is also hungry for attention, because she misses her husband and wants him to come back, and they are all hungry for love, which they lost a lot of when their father left them.  I think that his father is hungry for attention also, he tries to get his kids to be with him, but he will not support them if they are still living with there mother.  Overall there are various elements of hunger in this novel expressed by all of the characters.