Animals like cows and pigs do not stay inside pens made of fences upon reload of a world and server.
Environment
System.getProperty('os.name') == 'Linux'
System.getProperty('os.version') == '3.5.0-27-generic'
System.getProperty('os.arch') == 'amd64'
System.getProperty('java.version') == '1.7.0_21'
System.getProperty('java.vendor') == 'Oracle Corporation'
63rd Duplicate of MC-2025, please use the search function to see if your bug has already been submitted. Currently over 55% of tickets are being closed as duplicate.