There are some bug or exloit of taming.
The bug: I've leashed a wild ram to a hitching post. It longs about 2 days and nothing happened, he wasnt ready for taming process. Yesterday evening i've leashed another one to hitching post near. For today morning both rams dissapeared.
The exploit: Maybe there are easy exploit that allows someone aggro my taming animal on my plot, and this will stop taming process.