Thanks, Debbie, that's a great point. The point of the series is to show how basic misunderstandings between animals and humans create conflict. In the first book, the raccoons met the humans for the first time. In the second, habitat destruction drives the raccoons to a human backyard. This one is a little bit tricky because in reality, habitat destruction ends up being quite dystopian for raccoons and other animals -- they get disoriented and can't find food, water, shelter etc. In that kind of situation it's realistic for a mother raccoon to "adopt" orphan babies, but it's also realistic for two mother raccoons to band together to cooperate (as long as resources aren't scarce, which they aren't in this story). So while their mother's death/disappearance isn't strictly necessary, it does lend extra tension. Again though -- that may be more a function of writing for grownups!