I was wondering how long i should stay out with the puppies when house training them.

Two of the puppies will go shortly after we go out after them waking,eating playing ect.

But one of the puppies (Bob) will not go and as soon as we come back in he go`s.
Now yesterday morning i was out in the garden for 1 hour and 10 mins i even took out their water bowl and he had a drink from that and you you could see the pain on his face and sucking his belly in holding it so hard ,but in the end he went wee and poo.

Should i wait that long i don`t know.

They are now 16 weeks old and i have been house training them the last full 2weeks ,before that the weather had been pretty bad and so it was hard to keep the house training going because i house trained jubilee (puppies mum) no matter what the weather was like and now she will not go out side if its raining where as winston (puppies dad) does not worry about the rain and will go out do what he needs to and comes back in.

I did start off with training pads for the puppies but it was getting expensive so i brought tarpaulin and laid that down.
I would like to put the tarpaulin out in the garden ,but i am worried about them doing there business in the sitting room on a cream carpet.