Erm......First of all, welcome, donegal.
Secondly, the post you refer to is nearly 4 years old.
Thirdly, I can't really see what was wrong with that post. The poster (Greenwitch) stated that they had checked it out with a vet regarding their dog's problem, and it turned out that it was simply a case of the dog being able to hold it in for ages, as quite a few (young usually) dogs can do.
I have a 4 year old male greyhound, who absolutely refuses to go out even in the gentlest of drizzle. In the end, I have to trick him that a squirrel may be up the garden and, once he has stepped out, I shut the glass door and pretend I'm not taking any notice of him.
He tries to come back in for a few seconds, before realising that he is getting damp anyway, so he might as well do his thing.
He then gets rid of about a gallon, and trots back in happy as Larry.
Some young dogs have an amazing capacity. However, if anyone is concerned about their dog then they should go and get it checked out.....like Greenwitch did.