Re: Told to supplement...baby too small!
I would definitely see an IBCLC before supplementing (esp. for the reasons you dr gave). She can rule out any potential sucking/milk transfer issues, help evaluate your supply, and talk about different bfing management strategies that may help. Also, you mention the weight when he was born. What was his lowest weight? This can make a big difference when evaluating weight gain. Also, if supplementing truly is needed, pumped mother's milk is always the first choice if possible, so that's another option. Hang in there as you work to find answers (or a different dr.)
DS 1/2006 9 lb. 2 oz. 22 in.
DD 10/2008 8 lb, 2 oz. 20 in.