"Northoftheborder, did they advise zoledronate or Prolia."

Neither. A full-body bone scan* showed no other metastases, and things happened very fast for me: I was admitted to hospital on Monday with trouble balancing, was given a likely cancer diagnosis (unknown type) after an MRI on Wednesday, got a biopsy on Thursday, lost use of my legs on Friday from spinal-cord compression, and was on the operating table in the wee hours of Saturday morning for 10+ hours of emergency spinal debulking surgery to try to save me from permanent paraplegia (it succeeded, but it took a long time to get my legs back). I got post-op radiation to the surgery site 4 weeks later, and radiation to my prostate a few months after that. Otherwise, just ADT + Erleada (Apalutamide) have been managing my cancer.

No indications of other bone metastases since. I've lost a little bone density (not sure if it was before or after I started on ADT, because I didn't have a baseline), but nothing serious — regular weight training and calcium supplements help.

(* Note that a PSMA PET scan wasn't an option in Canada in 2021, because the maker of the imaging agent hadn't gotten final Health Canada approval yet; they always come to smaller markets like us a couple of years after the big markets like the U.S. and EU.)