[JohnnyB]

I would not speak with her in person. Do that and you are getting personally involved in their lives. Also, should either you or any person in the neighborhood later decide to report her to child services you very likely end up as the target of some very negative emotions when all you've tried to do is help. Either way, you're taking a chance of having your own life suddenly getting all wrapped up in their family problems that you are likely unable to solve and could get very messy.

Still, you obviously believe that this situation is an ongoing danger to the children and animals so I think you are morally obligated to take action. The best option for this is going through a service such as Children's Aid as mentioned above or whatever other services there are like that available in Calgary. They should have ideas of how to deal with it.