I thought this was well written, and well performed, and an interesting parable about self-improvement. I could even imagine the illustrations for the children's book version of this, with a somewhat disturbing image of a formerly cute mouse self-transformed into a pointy-eared, slit-eyed, slinking cat.
However, I think the author copped out by arranging things so that Gordon is only an academic cat, and never put in a position where his loyalty to other mice conflicts with his self-improvement drive. Does Cat School never make its students do practical exercises in mouse hunting? When Gordon unwinds in the faculty lounge, does he just politely abstain when the other professors nosh on his relatives, served up with bruschetta on rye crackers?
That this situation never came up spoiled the story for me.