Who is Cheeser from The Age of Wire and String and what is their importance?

Cheeser appears to be a pet, probably a dog, that the narrator had when he was a boy. The narrator's father kept smashing Cheeser, trying to get at something valuable inside him, and instructed the narrator to smash him as well. Cheeser had no hair left, and the boy fed him instead of smashing him, in the belief that because Cheeser was hairless, he would protect the boy.