Dont try again tomorrow. It's best to get them on a feeding schedual, and if you try again too soon it may stress him out more. Just wait till next Thursday, it won't hurt him to go another week. And if he eats it tonight, it could be that he was shy and didn't like the big heat mass (you haha) looming over him as he started to eat. They can't defend them selves while they are swallowing their food, so he may just be waiting until he thinks it's safe. Good luck with him!! ^_^