Size of 6 month lab?

[Brie]

Most chocolates i've seen are larger, most yellows aren't too large and blackies are smaller. I didn't mean to say there where a different breed. You just comprehended it sort of wrong. The size of the dog also depends on the size of the parents.

I've seen both. I have a friend with a yellow lab well over 100lbs... and it's not an over weight dog. I've seen black labs nearing 100lbs and have seen chocolate labs maxing out at about 65lb. But, I've also seen various combinations of this.

True. The size of the dog will greatly depend on the size of the parents.

You have a lot more control over your dogs size than you probably think. I know several Great Dane Breeders (just as my example of an extreme here) that take their puppies off of puppy food as early as three-four months of age. The reason being that puppy food has more protein than adult food, this encourages the puppies growth and weight gain. Having a large breed dog, like Great Danes (Lab's, of any color, are also considered large breed dogs) growing to fast can create alot of joint problems and set them up for arthritis later in life. The control you have is by switching to adult food at an earlier age to prevent excessive growth.

And backing up to your original question of will he big enough to play with a lab/dobbie mix, I wouldn't be so concerned with size, but, rather with the temperment of the two dogs.