In Butler v. Hanson, 455 S.W.2d 942 (Tex. 1970) the court held the evidence showed an adverse possession claimant substantially modified a casual fence such that it became a designed enclosure. Id. at 945. In that case, the claimant and his father changed or rebuilt the entire fence sometime in the 1930s; the fence had been a three-strand barbed wire fence, but the claimant, his father, and other relatives converted it to a net wire fence with two barbed wire strands at the top. Id. at 944. Around 1950 or 1952, he again repaired the fence by putting new posts between the old posts. Id. There was also undisputed evidence that the fence belonged to the adverse possessor. Id. at 946.