The RSPCA has enraged farmers by comparing cattle farming to stepping on a snail in a new video.In the video, a variety of animals sing Respect, by Aretha Franklin, whilst different creatures are poorly treated by humans. This includes a spider being swatted, a bee being caught in a lawnmower and the rearing of chickens. The two-minute advert, which was released alongside a rebrand from the UK’s largest animal welfare charity, then showcases exa…