I would have thought that a large would be big enough for a 70-lb. golden retriever, but it is too small. That's okay, though, I think he prefers to use it as a pillow anyway!
We have a 27 pound Whippet Mix. He is not a chewer, so I'm not sure how this bed would do with a chewer. I love that the cover is removable and washable! Mine is brown (only color available at the time) so not exactly a beauty, but certainly does the job.
I love that I can seperate the cover from the insert for washing. His other dog bed has to be washed all together. This is so much better.