Jesse use to do the same from birth until about a month ago. We didnt give him AF formula as it wasnt excessive and he was putting on weight fine. As Nessa says, it looks heaps but its really not. We just use to have a huge blanket or old sheet on the floor where he played and just changed his sheets when he did. He's stopped doing it now. Only thing maybe is trying to burp more often as usually the milk or food is just coming up with wind.