There have been plenty of tales in Texas about half man/half beast creatures that roamed the countryside. Whether it be fable, legend, fact or fiction, were-creatures have a long history in Texas, as evidenced, perhaps, in the tale of Cleo's Face, a limerstone rock carving near Junction that shows the ghastly carved face of what some describe as a werewolf.
http://texaslesstraveled.com/werewolf.htm