A. 
A person commits the offense of animal neglect if he or she:
1. 
Has custody or ownership of an animal and fails to provide adequate care; or
2. 
Knowingly abandons an animal in any place without making provisions for its adequate care.
B. 
All fines and penalties for a first finding of guilt under this Section may be waived by the court if the person found guilty of animal neglect shows that adequate, permanent remedies for the neglect have been made. Reasonable costs incurred for the care and maintenance of neglected animals may not be waived. This Section shall not apply to the provisions of Section 578.007, RSMo., or Chapter 272, RSMo.
C. 
In addition to any other penalty imposed by Section 578.009, RSMo., the court may order a person found guilty of animal neglect to pay all reasonable costs and expenses necessary for:
1. 
The care and maintenance of neglected animals within the person's custody or ownership;
2. 
The disposal of any dead or diseased animals within the person's custody or ownership;
3. 
The reduction of resulting organic debris affecting the immediate area of the neglect; and
4. 
The avoidance or minimization of any public health risks created by the neglect of the animals.
A. 
A person is guilty of animal trespass if a person having ownership or custody of an animal knowingly fails to provide adequate control for a period equal to or exceeding twelve (12) hours.
B. 
For a first conviction of animal trespass, each offense shall be punishable by a fine not to exceed two hundred dollars ($200.00). The second and all subsequent convictions shall be punishable by imprisonment or a fine not to exceed five hundred dollars ($500.00), or both such fine and imprisonment. All fines for a first conviction of animal trespass may be waived by the court, provided that the person found guilty of animal trespass shows that adequate, permanent remedies for trespass have been made. Reasonable costs incurred for the care and maintenance of trespassing animals may not be waived. This Section shall not apply to the provisions of Section 578.007 or Sections 272.010 to 272.370, RSMo.
A. 
A person commits the offense of animal abuse if he or she:
1. 
Intentionally or purposely kills an animal in any manner not allowed by or expressly exempted from the provisions of Sections 578.005 to 578.023 and 273.030, RSMo.;
2. 
Purposely or intentionally causes injury or suffering to an animal; or
3. 
Having ownership or custody of an animal knowingly fails to provide adequate care which results in substantial harm to the animal.
[1]
Note: Under certain circumstances this offense can be a felony under state law.
A. 
A person commits the offense of knowingly releasing an animal if he or she, acting without the consent of the owner or custodian of an animal, intentionally releases any animal that is lawfully confined for the purpose of companionship or protection of persons or property or for recreation, exhibition or educational purposes.
B. 
As used in this Section, "animal" means every living creature, domesticated or wild, but not including Homo sapiens.
C. 
The provisions of this Section shall not apply to a public servant acting in the course of such servant's official duties.
[1]
Note: Under certain circumstances this offense can be a felony under state law.
Whenever rabies becomes prevalent in the City, the Mayor shall, according to the necessity of the case, issue a quarantine order, requiring every owner or person in charge of any dog or dogs within the limits of the City, to either kill or impound his/her dog or dogs, or to have such dog or dogs immunized. Said order shall be published once in the paper officially publishing the business of the City; and in the absence of such paper, shall be posted as in case of sales of personal property. The Mayor is authorized by proclamation, to terminate any such quarantine whenever, in his/her judgment, the necessity for it no longer exists.
A person commits the offense of keeping a dangerous wild animal if he or she keeps any lion, tiger, leopard, ocelot, jaguar, cheetah, margay, mountain lion, Canada lynx, bobcat, jaguarundi, hyena, wolf, bear, nonhuman primate, coyote, any deadly, dangerous, or poisonous reptile, or any deadly or dangerous reptile over eight (8) feet long, in any place other than a properly maintained zoological park, circus, scientific, or educational institution, research laboratory, veterinary hospital, or animal refuge.