That IS a tough one. I know you don't want to report your mom. Is there someone living nearer to them that could lodge an anonymous complaint? Or perhaps you could send a letter to the local humane society so they could look into it. If the local authorities get involved, they'll have to clean up their act or cut down on the number of animals, but at least it'll get looked into for the animals' best interests. And it won't be from a family member, it will be someone with authority. With that many animals, I'll bet there are health codes that they need to abide by. Those animals deserve to be given proper care.