The Truth About Weight
So here are the facts on weight.
As you know, muscle is heavier than fat. A lean, muscular dog will weigh more than a dog who has not built muscle. It's all about density. A fat dog ,might look bigger, but actually weigh less.
My puppies tend to be very solid, due to the fact that from 6 weeks old, they are left to run with the adults and older puppies. They run, they wrestle, they play tug-a-war, they build muscle. A puppy of the same size and age, who is kept in a more confined area, will weigh less. BUT when it gets to your house and gets more exercise, and builds muscle, it will gain rapidly.
Some unscrupulous breeders, will even limit a puppy's food intake so they stay very thin. There again, when they get to your house and get to eat all they want, they will gain rapidly.
No breeder can guarantee weight. The smallest at birth can end up being the largest as an adult. The age/weight charts are useless. They are notoriously inaccurate, birth weight has little to do with adult weight. Puppies from a large litter will typically weigh less, at birth, than puppies from a small litter.
It's all about genetics. It goes back generations. A large female bred to an average to large male, can produce a 3 pound offspring, if there are small dogs in the ancestry, and visa versa.
The only way to guarantee weight is to buy an adult, and even then, a young adult will gain weight as it matures, and a sedentary dog will tend to get larger than an active dog, of the same size, although the active dog can weigh more, because, as discussed in the beginning, muscle is heavier than fat.
In the end, Does a pound really make that much difference. Isn't it the personality that really matters.