To me it sounds like a defensive strike. When it's a hunger strike they usually coil. If he is nervous and you are watching him, it may not be hunger but a bit of panic. I haven't ever had a picky eater, so no personal experiance here, just what I have seen/heard before.

He should be ok if you wait a week. Don't handle him, just let him get settled in and then next week make sure the f/t is warmed up properly and warm enough for him to really get a signal from.

Good luck with him. I'm sure you will get him healthy in no time! ^_^