my daughter started eating yogurt and cheese before she hit seven month. She likes both. Now she is 8 month old and the fourth teeth is going to break out skin soon and I am wondering if that is because those calcium-rich food. The cheese has a bit of salt but baby doesn't eat a lot, so I don't worry too much. Plus, you can find some cheese that is low in salt if you are really concern. All the food naturally has a bit of salt and sugar ( just think about all the fruits).