Hi all,
Just saw the question for tonight - Weds, 13th June
WHAT KIND OF PREHISTORIC ANIMAL IS DIEGO??
From,
http://iceage.wikia.com/wiki/Diego, accessed online 14th June, 2012 indicates that Diego is a Smilodon.
Also refer to,
http://en.wikipedia.org/wiki/Smilodon, accessed online 14th June, 2012.
My recommendation is: not to advise that Diego is a Saber-tooth Tiger as Smilodons do not belong to the same sub-genus as Tigers.