definitely understand the issue with time for pics man...i walk by the tanks almost every day and still don't have time to sit down and shoot pics and then process and post them (have been meaning to though). either way, thanks for posting as this will help greatly.
the break doesn't look as bad as i was thinking, it broke off a portion of the anterior mandible (essentially front-right of lower jaw). if it is healing already, just keep up with increased temp, water changes, and add 1tbsp salt per 20g...keep this up for a week or two and track its progress.
as for food, keep offering food as keeping it eating will help with the healing process; don't force it to eat though...it may just take time before it's able to successfully capture food; the fish won't starve to death in the mean time, just make sure it COULD eat regularly if it wanted to/was successful at catching food. it should be able to get food in a week or so.
keep us posted on its progress and although it will never regrow that section of jaw bone, it should be able to live and feed with just a little extra effort.--
--solomon