Cows, horses, goats or sheep cannot be kept on lots having an area of less than 20,000 square feet. The total number of all such animals (other than their young under the age of six months) allowed on a lot shall be limited to the square footage of the lot divided by the minimum area required for each animal as listed below:
Horses – 20,000 square feet of area.
Cows – 20,000 square feet of area.
Goats – 20,000 square feet of area.
Sheep – 20,000 square feet of area.