because of cough the child finds it difficult to swallow food...until the child recovers fully he shall behave this way... do not worry

I am facing a similar problem with my son currently. His appetite has reduced after suffering from loose motions and fever. One year is also the age of teething, that's also a reason for kids to become choose and picky eaters. Your child will regain his appetite in some time, once he feels better. Just keep offering him the food of his choice in every few hours. Do not force feed and try to make the entire eating session fun and entertaining.