My 6mths old bb has not pooped for 6days. He was 90% bm and 10%fm (friso gold stage2). Drinking 150ml per feed. Each day about 4-5 feeds. He's super active and smile/laugh alot. Tummy is soft and has strong smell for passing out gas. My hubby said he is not having enough thus he fed him fm saying this will make him full compared to bm. But my idea was he is too active thus absorbs pretty much everything he drink. Also chances his digestive system begins to mature thus bowel movement has decrease... Thinking to start solid food tmr. Any idea what to start of with? How much to give? How many time per day?