dinosaur nail-hooves??

["Ken Kinman" <kinman@hotmail.com>]

Dear All,
    I am wondering if any of the big non-theropod dinosaurs might have had 
evolved something like the nail-hooves of elephants.  Or are nail-hooves and 
true hooves unique to mammals which evolved faster runners in the grasslands 
of the Cenozoic?
     And also a question about the number of toes.  At least some of the 
mammalian pseudoungulates have a different number of toes on the front and 
back legs.  Does this occur in any of the big non-theropods?  Maybe these 
are dumb questions, but I'm not normally very interested in the 
non-theropods.
                --------Ken
_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com