Unfortunately it is not a bug but rotten luck. Mine wasn't quite as bad as yours, took me 3 skill books before my pet finally learned it. But i do wish they would do something about the lousy success rates of these skill books, after all they're not exactly cheap.
We're planning to do something to the skill books.
Blackout Post at 2010-3-29 18:30
GM, I think you should make The % fail not too much, And Not mention that one of problem from my Opinion Is when your pet Learn skill it can forgot The previous Skill.
I have some difficulty with this.. Try Learn new skill and my pet forgot Old Skill