Thank you all so much, it's been such a great help hearing from you all with your well wishes, links, experiences and advice. I am so encouraged by it all.
Delilah had her op and the vet is very pleased with how it went. Her heart and blood pressure were very high but he believes that was due to the chronic pain and they have come down. She is now on all kinds of pain relief and I will ring in the morning for an update. The chest x-ray is clear so fingers crossed if it is bone cancer there has been no spread.
It's been so strange coming home to a house with no dog this evening, I don't like it - I can't wait to get her home again.
Once again - thank you all.