We had Porter's 9 month check-up today. He weighed 18 pounds and 2 ounces...3.5 pounds less than Pax weighed at his age. I guess they're not joking about the weight difference between breasted and formula-fed babies!
He was only in the 20-25th percentile which is crazy! The doctor said he looks perfectly healthy and is really playful and social. He is doing fine with his milestones.