Most interesting.....  I would suggest the possibility of two cartoons using
somewhat the same story line.  The one I'm referring to ended up with Buggs
tunneling halfway across the world, to Florida, for his escape and, when the
Abomonable Snowman followed, he melted.  The kangaroo as a mouse was done in
several Sylvester cartoons, most memorable to me being the one where he was
out to teach his son how to hunt mice.  The setting for that was aboard
ship.  They also did it in a Tom and Jerry and did at least another *giant
mouse* bit with a baby elephant and it's mother.
   Still, it's good to encounter another evincing the signs of a misspent
youth ;-)
Cheers,
Jack