Dogs didn't get good press in George Orwell's book. There the dogs represent the military/police. Shortly after the last revolution, several pups were stolen from their mothers and groomed and trained to protect dictatorial Napoleon from a second potential
Lesser mortals working class like the baby boomers must empathise with Boxer the plodding horse, who ended up at the glue factory after a life-time of struggle. Always portrayed as a dedicated worker, but as possessing a less-than-average intelligence, hence the constant talking down to. Occasionally the spurs are dug in for a spurt of required productivity. The novel accurately describes the horses as being "most faithful disciples" and that they "absorbed everything that they were told [by the pigs], and passed it on to the next generation by "simple arguments".
The pig in the book is Squealer, representing the Russian media, who spreads Stalin's version of the truth to the masses. We all recognise the similarities in the MSM.