A lot of mine were and I was convinced that I was going to have to find a way to get the right sized rodent every week. But! I was able to get them all to eat f.t at one point. Now I just gotta get them back to that. I feel like I can trick them by throwing a couple live ones in and then offering a f.t the week after lol It worked for me, but I know some are harder then other to convert.