I would say it depends on the dog...My Charlie got a lot bigger after six months, he probably stopped getting taller and longer at around 8 mos. like others said but he still filled out more after that. He was 6.5lbs. at seven mos. and is 8lbs. :shock: now at almost a year. :lol: He really likes to eat, and will eat anything so that might also have something to do with it lol :lol: