Has anyone else had this problem and if so what did you do????

DS has been a reasonable eater in the past up until around 2 days ago. He usually has my homecooked food but we tried him on some jarred stuff a couple of nights ago in preparation for if our power went out with the cyclone. He spat it out immediately so we (being quite proud of ourselves actually! ) thought, "Oh he only likes mummys food". Since then he wont even touch my food and keeps screwing up his face and spitting it out.

I checked that I havent made it too hot or cold, he doesnt appear to have any new teeth coming thru so we dont know why all of a sudden he is rejecting it?

Any thoughts??