Evan-well child check

Our baby is 9 months! ;o( Where does the time go???? His stats are:
Weight: 18 lbs 3.5 oz 28%...he seems to be thinning out. Doc wasn't worried said he would catch up at 18 months or so. Babies get active and slow the weight gain for a bit.
Height: 29 1/2 inches....90%