my son is shrinking. He was in 18-24 month tops and sleepsuits and 12-18 month trousers. He now seems to be in 9-12 month trousers. His still in 18-24 month tops and vests but more because he has a very long body and because we have them. His gone back into 12-18 month sleepsuits and looking at him tonight they've got even bigger on him. Is it normal for them to lose this much weight. He still looks big so I'm not worried about it but his got taller again so it must be fat his losing