What is a polite way to ask my neighbor to pick up after her dog?

I live in a townhouse and my neighbor has a dog. I think when she leaves the dog with her little brother he doesn't really watch after the dog and it will poop right in front of my house. This has happened like 3 times. She is a really sweet woman so I don't want to be rude about it, but quite frankly its... show more I live in a townhouse and my neighbor has a dog. I think when she leaves the dog with her little brother he doesn't really watch after the dog and it will poop right in front of my house. This has happened like 3 times. She is a really sweet woman so I don't want to be rude about it, but quite frankly its annoying and disgusting and I don't want to deal with it. How do I go about letting telling her about it in a nice way?
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