I am a new guy on the forum, but a few days ago while lurching I read this thread.
One thing I can tell you. It will always be something with nieghbors like these. Composter-- you got rid of it, gone problem solved. Nope, now it's skunks, skunks I say. BOLOGNA! Next it's going to be your car is to loud. You cut your grass wrong. You talk to loud, Your lights are to bright. The chickens are noisey.
Go ahead and tell her off now, get it over with, they ain't never going to be good nieghbors, so why worry yourself over it. Tell them face to face, they are not welcome on your property, or in your home.
The child, well I can't turn my back on a child. Not the kids fault she has a donkey for a mom.