It is unlawful for any owner, keeper or walker of a dog, cat or other animal to permit said animal to discharge its feces upon any public or private property within the city limits other than the property of the owner of the animal unless the animal’s feces is immediately thereafter removed from the public or private property and disposed of in a sanitary manner. All structures, yards or pens wherein any dog, cat or other animal is confined must be kept clean and free of odors caused by urine and/or feces.