When should I start training my puppies they are currently 7 weeks ( boston terriers)
House training, yes...but go lightly on any obedience type stuff...(I can't tell what "training" you're talking about)...Most pups can learn very simple things like sit and down at that age, but you can only work with them for 5 minutes or so at any one time, 3 times a day. At nine weeks you can up that time to 10 minutes, 3 times a day for training.
Don't try to train them together...put one in a crate while you work with the other...or they won't be paying attention to you...
Start training them now. They are old enough. I got my puppy at 7 weeks and right from the get go I started to train him. so go ahead.