Thanks for all your replies.
I think the problem with the house training has always been there.
The family who had him were out all day and were never really able to spend a decent amount of time to house train him from the start.
He would mess in the house throughout the day and have nobody there to tell him it was wrong and let him out.
We were told he had the odd accident but I don't think this is the case.
We were advised he had major chewing problems but I think our 12 month old is keeping him entertained in that area and so has not chewed (yet!) plus a job lot of chews etc has helped..
We had an incident last night, they had a little fight and the rescue dog caught my 12 month old in the eye, as there is no obvious damaged that I can see it is still bothering him this morning, he keeps closing his eye and pawing the area.... even more concerend now..
I am very aware that my 12 month old has had his routine up-routed, as with the rescue dog, which goes without saying, but I don't think my 12 month old is taking it too well, he has become very distant to us and even growled when moving him off a chair to go to bed, he has never done this before and this has happend twice now in just a few days. :? :cry: I did tell him off for as we cannot allow this but I was wondering if this is because the pecking order has been interupted and he is not sure where he fits in at the moment.. I really don't want to have to start shouting at him but I know we need to if he does this sort of thing. He even did a wee in the kitchen the other day and I was mortified as he won't even do anything in our garden now, he has to be away from his home to do his business, he's been house trained since about 2 1/2 months old with no lapses. I feel really terrible for telling him off, as we realise there must be a good reason for this in doggy world.
It would be so much easier if we spoke the same language!!!