So, he is definitely thinning out (he only gained 3 oz. in the past 3 months), but is still a very Big boy overall. The good news is that he's happy and healthy. We were at the doctor's office for a very long time, which began to wear on Big-- especially since he knows what comes at the end.
Big kept announcing, "I'm done! I need suckit" and "Done, done! Want sucking!" He seems unable to say sucker with the -er ending, but that's okay because it's so much cuter this way. He finally got his "suckit" after an hour and a half! I should have given him two.