I have recently dealt with the people next door, who had a dog they left outside, and didn't even live in the house! Through the years, the doghouse got torn down, became non functional and there was the dog, in the yard, with no shelter. Did you make trips, go on vacations, travel, leave the property and leave the dog where it could not get into the house, were there times when the weather was bad when "Sabrina" couldn't knock on your door and be admitted? This was an outside dog, with a thick coat of hair, like a St. Bernard but excuse me, when the dog has no place to be except a really cold wet yard, or a really hot miserable shadeless yard, and you're gone, not paying attention to her, that's really abuse. If you loved this dog so much, WHY no outdoor doghouse or shelter?
I would bet money that if you try to defend yourself and they find out about it, there will be a bunch of people show up from around the neighborhood (we had animal welfare on speed dial, as did most of our neighbors) and angrily disagree with your maintaining that you took such excellent care of this dog, when no shelter was provided for her outdoors. You weren't there 100% of the time, she was.
This dog we were so concerned about lived to a ripe old age, but that was partly due to our constant vigilance and care which we sneaked over and provided, the constant checks by animal welfare, and in the meantime, these darn people were fostering other dogs for the adoption society at their other home. Pay the fine. Having no shelter was a mistake.