....When he first started slipping I took the little freedom that he did have and started crating him most of the time just as Ed suggests. After a while he got better and I started giving him back some freedom.
.....The part that really bothers me is that he woould have had plenty of opportunity to go if he really needed.
You pretty much answered your own question. You have to back up and start over. I refer everyone whose dog I help with to this article:
http://leerburg.com/housebrk.htm
I just went back to it to make 100% sure that it included "re-training" an already-trained dog who starts slipping, and it does.
This part is important for you, I think:
QUOTE: A puppy is NEVER ALLOWED TO HAVE FREE ACCESS TO THE HOUSE unless you have your eyes on the pup. If he poops on the floor because you turned your back for 45 seconds - well you screwed up and made a mistake. Don't blame the pup for your mistake.
The only time pups are loose in my home is just after then come in from going outside and then it only for short periods of time. All of my interaction with my pups is done outside. I NEVER leave a dog unattended and loose in the house until it is 18 to 24 months old and then only for short periods. END
I grew up in the Boston area, so I know: It's cold and neither one of you wants to be out there. But IMO the brisk walking (I mean walking, on his leash, fast enough to get his innards working) is often what gets everything started, and maybe you are just coming back inside too soon. It really sounds like it. He was trained, so he understands it, right? He isn't holding it in to go on the carpet. What you think is "plenty of opportunity" may not be, if his exercise is limited because of the weather to start with, IMO.
Exercise does get the bowels moving.
I started to type more about a good schedule, etc., but then remembered that it's all in that link.
If he really "just didn't want to go out in the snow and cold," he still would if he was out there walking until he went. And he didn't just become retarded when the cold weather hit.
Exactly what you did before -- when you followed the video and it worked -- you just have to do it again. I wish there was a magic poop button, but a schedule and structured exercise and everything else in the article and the Q & A are it. (Well, there's Will Rambeau's poopie song, but I don't know if it works when sung by others.)
Dress warm and take him on a blood-warming walk, and when he goes, praise him. You know the drill; it's hard in this weather, but a little extra time outside will give him a chance to do all the peeing he needs for a while (instead of three trips out in five minutes), and especially get the poop mechanism going on schedule.
The peeing on command, which doesn't sound like your major complaint, is addressed here:
http://www.leerburg.com/ubbthreads/showf...rue#Post4167004
If I'm forgetting something, I know others will help out.
Good luck! It will work out!