Hey Maz, so glad to see this and that you are giving a big raspberry to the MCHN He is doing just great as he is. Check out this link too for BF baby weight gain kellymom.com :: Average Weight Gain for Breastfed Babies (Metric) - Mat isn't that far under what the average is, so in my book that means he is doing great.

BTW - what you said about CP kids, that might have more to do with it than you think. My neice has mild CP from birth trauma and was fully BF till 12mths and she was a tiny little thing too until about 8mths old (she is now 16mths and still BF, but has cows milk now too) and she was having a lot of intensive physio too.