Hello Betsy – pic update for you. Gary is over 6 lbs and looks like a bowling ball! We had him neutered in Jan. He’s doing great but he eats too fast. We’ve stayed on the food types/amount regiment you suggested. However, because he’s still capable of destroying the entire house, we still keep him in his own room – a powder room. We feed him around 7am and then again ~4pm. He plays for a while before we put him back in. We also let him out around 7:30pm and lure him back into the room with diluted chicken water. He still wants to rough house and will bite/scratch every now and then (mostly me). 
just wanted to send you a couple current pics of Gary. He's now 14.2 lbs and adorable. 
He's as healthy as can be and loves to tear through the house