Baby won't eat anything I make him

I don't know what happened but he used to eat everything I made him. He's almost 9 months old and this has been going on for 2weeks to the point that he won't even open his mouth for the food. He also won't take his bottle. The only thing he wants to eat is bread and plain yoghurt. I'm not sure what to do..is anyone else experiencing this? Some advice or any suggestions please??