you know that now when you choose the card that your pet gives you it will cast it, well i have a couble of ideas for when it fizzles:
First, i think you made the fizzling too obvious since it won't show the swirling symbol thingy when it does, insted show the thingy when it fizzles. Secondly, after it fizzles have the pet do what it does when it loses a minigame.