Transitioning to whole prey is similar to transitioning from canned food to ground raw, or from ground raw to frankenprey. To your cats, it doesn't doesn't look the same and doesn't smell the same and doesn't have the same texture as what you were feeding before. So naturally, your cats are going to be cautious about the new food.
Treat it the same way you would treat any of those other transitions. Go slow. Take more time between feedings to the cats are hungrier when you put down the new food. Be patient. They'll eventually come around.
My cat took about a week to adapt to whole prey (from ground raw and bone-in and muscle pieces), and now whenever I try to feed her pieces of raw chicken, neck, heart, etc, she just looks at it like "What is THAT? You expect ME to eat it?" as if she didn't go crazy over that stuff less than a year ago.
She does still go crazy for liver, though. And she still eats canned food if we offer it to her.
Last edited by marie73; 03-25-2013 at 04:23 PM.