My mom just called to ask me when the chicks that she took home can go outside. I told her that they had to be feathered. She started complaining that they keep jumping out of the box and running all over her house and she doesn't have another tub that's taller. I asked if she had a screen on the top, she said no. Problem solved.
True! Unless you put a spoonful of coffee grounds in your mouth, and swallow only a sip of water to get it down.
The grandfather thing doesn't hold much weight depending on how badly the powers that be want to eradicate some activity. There was a hog farm here for many decades. A city was created around it. Then, a subdivision was built around it. (Didn't the developer know there was a hog farm there already?)
I'm sure the developer figured he could use their financial power to put this guy out of business. It worked.
He was forced out.
That really is too common!