It is unlawful for any person by any means to make accessible to any animal, with intent to cause harm or death, any substance which has in any manner been treated or prepared with any harmful or poisonous substance. This provision shall not be interpreted so as to prohibit the use of poisonous substances for the control of vermin in furtherance of the public health when applied in such a manner as to reasonably prohibit access to other animals. (CC § 08-10-016 (6))