I just got my normal male to switch to frozen thawed the other night. I got him when he was about 500 grams and he just topped 1000. I tried to get him to eat frozen thawed around the time I first got him, but he refused 5 or 6 times. I fed him live ever since. Two days ago, I decided to try again. I tried the trick of rolling the rat in some used rat bedding. He hit the rat right away. You could try it and see. But yeah, he probably won't eat until he gets feeling better. Good luck.