
I have had a mop like breed from the Utility group all my life (ok since I was 2). My first question would be, is she keeping both boys or is she running both boys on for a few months? the boys would most probably be fine together until sexual maturity, then problems would begin because of her having bitches.
I do know of people who successfully keep male together but I have never been successful in this as I have bitches. And I'm pretty sure that the males kept together had an age gap.
I have never kept two boys from the same litter, but have kept two girls. They couldn't stand each other & constantly fought. In the end I had one girl & my mother had the other. I had to move back in with my mum for a few months & even at the age of 12 they tried to kill each other :-(
My honest opinion, is I WOULDN'T do it. But then I wouldn't recommend having two pups of the same age whether they were from the same litter or not. Training one pup is a huge commitment as it is.
Agree with the above post about rehoming now, not with a history!