do you think 3 males allabout the same age 6 months would get alot in the house together they are bullmastiff very quit and laid back loves all other dogs ,a dogue db who is much the same they have been together since they were 10 weeks old.we would now like to buy aneo puppy as well we would have him nutured if this would help.

Sounds like a recipe for disaster to me. That's what I think.
Dawn R.

IMO plain daft to have 3 pups in the house together no matter what breed or sex. leave at least 2 years, better 3, between dogs.

Puppies who get along at 6 months can be completely different to the same dogs at 18 months. You could end up with world war 3 in another year!

I think you should wait at least another year before contemplating having another dog, preferably 2!

Seriously bad idea in my opinion.  You should leave at least 18 months but ideally 3 years between dogs.

Sally

if they are all males it should be ok you only get problems when the femals coem into season etc we keep all our dogs in kennels so we dont have that problems have you thought of kenneling them

They will be fine probably till they reach the stage where hormones start kicking in and then they will start fighting for rank.
The only way you'll get away with it is if you have kennels
Archer

Don't think I could contemplate it.  You'd be devestated in a years time for example when you could possibly have to re-home for their and your sanity.

you will need to make sure theyre heated kennels as your 3 breeds are all shorthaired

Apart from the mind blowing effect of having 3 adolescent males in your home with you, how do you find the time to give the one on one attention that every pup needs and deserves, if it is not to grow up under trained and un-socialised

it amazes me how people with small children find time to train a puppy too a lot of people who have bought pups have a couple of small kids and i always wonder why they would want a puppy running round wreaking havoc too!!

I think you will be inviting trouble into your house, i have bullmastiffs and i did have two males living together..they were litter brothers and had never been apart, but saying that i also had kennels so if there had been any trouble i had the means to keep the apart. You say the two males get along now..thats fine, but bringing in another large breed male dog will in my opinion upset the balance that you already have and as others have said the problems tend to occur when the hormones kick in at around 12/18mths.
Please think long and hard about your decision, personally i wouldn't even think about another dog until the puppies are 2/3years old.
Karen.