You have a retriever and a lovely one at that. She thinks she's doing her job. Get her a bunch of balls and leave them in the yard for her to bring to you. My first golden (rest her sweet soul) destroyed a beautiful big hydrangea during her puppy years.

Can't help you with the rose problem. They are hard keepers and are way beyond my gardening skills. I have heard that there are some plants that discourage deer, so planting something like that near the rose might help. That was a lovely tribute to your sweet angel dog....fingers crossed that you can save the rose.