Missouri Revised Statutes Title XVII. Agriculture and Animals § 272.020. Fencing requirements

1. Any fence consisting of posts and wire or boards at least four feet high which is mutually agreed upon by adjoining landowners or decided upon by the associate circuit court of the county is a lawful fence.

2. All posts shall be set firmly in the ground not more than twelve feet apart with wire or boards securely fastened to such posts and placed at proper distances apart to resist horses, cattle and other similar livestock.