Farms for the keeping or raising of animals, excluding poultry farms, rabbit or other small animal farms, fish or frog farms, dairies, hog. farms, feedlots, slaughterhouses and kennels unless otherwise specifically permitted in the zoning district which is combined or if they exist on the day the property annexes. Any new poultry farms, rabbit or other small animal farms, fish or frog farms, dairies, hog farms, feedlots, slaughterhouses and kennels proposed subsequent to annexation are specifically prohibited.