To me "pulling" just means you used something more recessive than the hiding traitor the trait you're wanting to move. Which means the kitty gods (server) let it pass. lol If it bounces the trait you're using to "pull" then chances are it's the same trait or something more recessive.
But I like my childlike romantic kitty version of breeding. Every box is like Christmas! The heck with the math and statistics! It's still the rush when you see that box sitting there taunting you with the unknown till you click on it or look in chat for those who have the magical box that tells you when it's made.
Yes we need the math and charts, don't get me wrong. (I use them all the time lol) But never lose the childlike fascination that Santa Server gave you a gift.