It is unlawful for any person to throw or deposit any known poisonous substance in any of the streets, alleys, parks, commons, yards or other places, whether public or private, within the city, so that the same shall be likely to be consumed by any animal; provided that, it is not unlawful for a person to expose on his or her own property common rat or mouse poison, unmixed or mixed with vegetable substances. (Ord. 98-34 § 4, 1998: prior code § 4-29)