Replying to My Neighbor....

Ok NSG i need a little advice on what to do here...

  So the lady i live next to has at least 30 cats. about 15(the male cats) are under a trampoline with chicken wire and a tarp surrounding it so they cant go re-produce(she feeds them at least 4 times a day). 24/7 her house smells like cat piss and its worse when it gets hot. Also the pregnant cats moan and groan all night and it makes you want to rip your ears off. Confronting her is not an option because i think she might be insane(she has gas heating, she has a car but cats live in it and the car hasn't moved in 4 years). Since she has no car she rides her bike about 10 miles to the closest grocery store for food.

So what should i do?