Personally, I have no problem with the acting, nor the script. I do have a problem with the giant bird. It was simply AWFUL. Plain and simple.
One's first impulse is the roll around laughing when one sees it. What were they thinking!? Budget be damned. The monster bird was a monstrous joke.
Of course, in my opinion if the producers could obtain actors such as Ankrum, Corday and Morrow, then they would have the special effect people come up with a much better beast. Oh well. What is done is done. This will be the case of the eternal joke on them that was unintended.