...teeth were carnivores? Especially if all we've discovered of a given dinosaur is petrified teeth. We can't tell what they might have eaten unless organic material was preserved. How do we know the t-rex only ate meat? Even modern carnivores may sometimes eat plant matter--intentionally, and not simply because it was in the mouth or gut of their prey.
Ranger, take another look at the fruit bat and the panda.
http://smithsonianscience.org/wordpress/wp-content/uploads/2009/07/skull.jpg
http://farm4.static.flickr.com/3172/2739007600_ee73fb590b.jpg
Those look an awful lot like canines to me. Remember, the panda is a type of bear, so they're going to have all the same teeth other bears have. Granted, most bears are omnivores, but the make up of the teeth does not change from the panda (strictly vegetarian) to the polar bear (almost strictly carnivorous).
Ranger, take another look at the fruit bat and the panda.
http://smithsonianscience.org/wordpress/wp-content/uploads/2009/07/skull.jpg
http://farm4.static.flickr.com/3172/2739007600_ee73fb590b.jpg
Those look an awful lot like canines to me. Remember, the panda is a type of bear, so they're going to have all the same teeth other bears have. Granted, most bears are omnivores, but the make up of the teeth does not change from the panda (strictly vegetarian) to the polar bear (almost strictly carnivorous).