Av been talking to a few friends an some of them say a pup is more aless full size at 9 months and a few other people said 12 months and a few have said 18 month . What do use all think ? I think a dog is mature at 18 months by about 10 months they have there height then they just thicking out ? Av got 2 pups one is 11 months stands about 24.5tts and the other pups 9 months stands near 24tts