I have been camping the dodo for 3 days now! got six stacks of Cockatrice Meat, Claimed DD 18 times without drop, finally dropped the skin today!
Best strategy I found was to run round constantly in a big circle and kil all the tabar beaks and eventually the dodo will spawn. There was some competition from people farming Cockatrice meats. But nothing too major!
Good luck with this stingy monster!