What is Mom’s attitude towards the various animals and bugs that live in their house in Battle Mountain?

From the text:

In Battle Mountain, we'd had lizards to eat the flies and cats to eat the lizards. We couldn't think of any animal that liked to eat roaches, so I suggested we buy roach spray, like all our neighbors did, but Mom was opposed to chemical warfare. It was like with those Shell No­Pest strips, she said; we'd end up poisoning ourselves, too.