Whether they are babies or not, goldfish will grow very quickly given the right environment and are incredibly messy regardless of size. They produce a lot of ammonia which is deadly to fish. If you don't know about cycling, I suggest you read through the links in my signature so that you understand why you must never over-stock your tank. You should realise that they are very messy and get to be 12 inches long. This might be longer than your tank's width! If your fish are healthy and are in an adequately-sized tank (which they are not at the momment), you will find the goldfish grow at a remarkable rate. It is essential that you either up-grade your tank or only keep one of the goldfish and nothing else. Alternatively, get rid of both goldfish and keep the white clouds which are lovely little fish. One thing is for certain, you can absolutely NOT add more fish.