Since the Mini Goldendoodle is a crossbreed between two different dogs, it's hard to put an exact time on when your Mini Groodle will hit full size. In general, their weight will start to taper off around 7 - 10 months. After a year they should be around the maximum height and they should start filling out and gaining a little more weight, between 1 - 2 years of age (depending on their diet, and genetics).