Glad to hear you have your DLA back Couthy.
I have had a truly horrible day.
We saw the vet on Monday and agreed to have my old girl's chest xrayed, because her breathing seemed a little odd and she had been coughing. Vet said at the time that she was happy that she was comfortable and there was no urgency.
Tuesday she was much more restless, more coughing and since then has been less keen to get out of her bed to go out. This morning she didn't even get up when I picked up her harness and lead.
Took her in for her xray first thing and when we arrived the vet said she felt the bad leg was unstable, which it hadn't been when we last saw her on Monday.
They were hoping to do the xrays with her awake rather than put her through a GA, but in the end had to sedate her.
Xray showed lots of lung mets and that she'd sustained a pathological fracture to her bad leg. It would only have taken a slight knock or twist with her bone as badly damaged as it was by the tumour.
The vet gave her an injection of painkillers and kept her sedated and Dh came straight home from work. We both held her while they put her out of her pain at half past twelve this morning. 
It's been a long hard day and our other dog has covered the kitchen in slobber through the stress of being on his own at home for the first time ever in his life. He was howling really loud when we arrived home. We took him for a long walk this afternoon and he's calmer now, but very sad. He's spent the last three weeks trying every trick in the book to get into her new memory foam bed at every opportunity, but today he hasn't tried to get in there once, even though it's empty. He's a sensitive soul and I think he's likely to be the type of dog that grieves, we are probably going to have to do a lot of work to get him through this.
Unfortunately he was also rushed into the vets on Monday, as he was dripping blood. We had both dogs there at the same time and the bill came to an eyewatering £178.00! 
He had lots of tests and checks and it seems it's his prostate. Fortunately his urinanalysis didn't throw up anything worrying (no stones or signs of cancer - thank God) and his symptoms seem to have stopped since he's been on meds. As he is entire, he was given an injection to reduce/remove his testosterone for the next 6 weeks and is on antibiotics and anti-inflammatories. Basically it means we will have to have him neutered to reduce his testosterone, as that's what's feeding the prostate problem. Ironic really, as the reason for not neutering large breed dogs is because it increases their chances of getting osteosarcoma. 