To put it plunt its a no,no as said pups will bug your older dogs. Either your older dogs can die of stress or more common the pup gets moulled or killed always kennel a pup seperate.
"Die of stress"............ , must admit i have never heard that before. But i would not put a pup in with an older dog in fear of the older dog killing the pup.
what age do u reckon i try it in with em ?