I adopted a dachshund and was told he is a mini. I took him to the vet they say he's definitely purebred. He is only 11 weeks old tomorrow and already 6.1 lbs. I have heard from others that their minis were like 3 lbs at this same age! Surely by the time he is done growing he will not be within the weight range of a mini right?? When does their growth rate slow down or when do they become more predictable of their final size?