It was interesting that you all responded to how my dog might feel about being left home alone ..
... actually, it was more about how *I* feel about leaving him at home :-) I think it's ME that gets the seperation anxiety!
The house is very secure, we have a good, well enclosed garden. If I have to leave him at home, I have left the back door open for him (very secure because we have high fences all around (sorry I don't know what it's called) covered at the top with the black sticky paint that deters burglars.
There is minimal noise as we are at the end of a cul-de-sac
He always gets 2 good walks a day (sometimes 3)
So there's no problem with him going out and having a pee whenever he wants, and he's always had free roam of the house and has never been destructive. We did have a crate when we first brought him home, but after a while, he kept sitting or sleeping on a part of the sofa - so that's where he sleeps these days - I guess that must be the good feng Shui spot in the house! He doesn't moult, so it's no problem. And he always lets himself out for a pee ..
Maybe I'm just a born worrier, but when I leave him for a little while even, I imagine he's feeling rejected and lonely. And then I worry about things that are unlikely to happen ... like what if my car breaks down, or I'm held up etc. !!
It's just that there have been instances where I needed to be out of the house for 3-4 hours and I have avoided those and was wondering if this is ok for a dog that's just turned 13 months?