I wasn't able to update before the weekend, but I just wanted to post that Eli GAINED weight! Hooray!
I went to the doctor on Tuesday and Eli gained back the 5 oz he lost, plus 5 more! So he now weighs 16 pounds and 14 ounces (25%). He is 28 inches long (50%). The doctor attributed it to the fact that he is so active, which makes sense. I just hope he continues to thrive and grow.