I'm not sure how I feel about the chain law, but I can tell you this, I don't understand what it is in some people that allows them to think of their domestic animal as livestock.
I have to assume this is what enables them to treat their dogs and cats so callously. Never allowing the animal into the house during bad, even extreme, weather. Never showing the love and attention a domestic animal deserves and requires. My heart wishes we could demand they not be allowed to own animals.