It is never too late to crate train..When I got Samson at the age of 6, he had just been crate trained..Didn't like it, but it was either that or have major damage to my house...Angel is great with crating, just open the door, pop a couple treats in and she goes right in....Like Sully said tho, every dog reacts different, poor Oggie just suffered terribly.....Try it and see what happens, it's better than having your house destroyed and Carter getting into something he shouldn't