Training adult dogs

Question
I have 4 terriers, 2 ratties & 2 cairns, all under 5 years, all under 12#. 3 females, 1 male, all neutered. One female is a "rescue" and used for breeding at a mill.  When I acquired the first dog, I lived in an apartment, so used potty pads. They like the pads and are fairly reliable on them.  The rescue will urinate on living room carpet and poop on hard floors if given the opportunity.  During the day, the male is in a crate and the females are confined to kitchen/porch where pads are accessible.  At night, all sleep in our bed and pads are in the bedroom. Now that we are in a house, I take them out and they will potty outside, when the mood suits them.  They are fed on a schedule, 2x daily.

I want to stop using pads.  I want them to "hold it" till they go outside.  I want them to go outside when I take them out!  I know they are small (littlest is 7#). So frequency may be an issue for them. Would it help to cordon off part of the yard and place pads outside?  Would it be better to take pads out of house and go "cold turkey?"  I can give treats when they go outside, but others look confused as to why they don't get treat.  It's hard to get them on a cycle. Also, with the rescue in the mix: She must have been confined to a crate as she will "potty where she sleeps."  She is also crate-phobic & using one causes her to panic. Do I focus on the others and just keep her tethered to me when we are in the house? And how do I handle days/nights when I can't watch them "like a hawk?" I can confine females to smaller space. But with rescue girl pooping, the others seem uncomfortable with the filth.

This morning, we were outside for 20 minutes. I brought them in, left them alone in kitchen for 15 minutes.  In that time, 2 poops and 2 pees on the pads! We'd just been out! Frustrating!  Thanks for any advice!"

Answer
This is difficult, because the only way to successfully house train dogs is to prevent them from having access to the home without strict supervision.  That's why we use crates or tethers, and if you have other family members who will help, you may be able to successfully train them with those methods.  Lol, fairly reliable is not reliable in my book;-)  But, at least, with the dogs that use pads, you could try putting the pads outdoors, and just gradually make them smaller and smaller until the dogs are wee-ing on the grass.  The rescue dog will probably require constant supervision, because she isn't clean in her bed and can't be crated.  You could use an ex pen if she wouldn't soil the area, and perhaps paper the whole bottom of it with pads, then do the same thing as with the other dogs. Don't scold any of them for mistakes (they're the humans' fault for not supervising lol).  Some dogs will become fearful of doing their business in front of humans if they are scolded - those are the dogs that stand around, don't go, and then pee as soon as the person lets them in the house!