Hi there, this is exactly what I went through in the last couple of weeks. My son just had his first birthday and we had problems with his eating as well. He would either eat a little bit or just not eat at all. he loves the goldfish and the cheerios like your son. Everytime I fed him he would start turning and twisting and the only way to make him eat was to keep switching different toys. It was super frustrating. Well the good news is that it goes away. It lasted for about two weeks. Now he is back to normal and eats just fine. So I think that it is something that they outgrow and we just have to keep our cool :).