Table Manners for Mikel

I need to teach Mikel some Table Manners. Tsk.
I dunno where he got that.
He was crying cause he couldn't get his feet up. haay.
Actually, that started way back when he was a baby, like 5 months or maybe earlier, can't really remember when exactly. But I know, it was with his stroller. When we stroll him around the house or outside, he would ALWAYS put his feet up.
Now, my dilemma.. If I put his feet down, he won't eat. he would only eat when his feet are up the table. should I teach him table manners already at his age?