Have You Encountered This? Bernese Mountain Dog Prostate Issues

A friend asked me to turn to you, my readers and friends, for insights on an issue he has with his dog.

Do you have experience the following problem? Can you offer any insights?

His 7-year-old Bernese Mountain Dog gets Benign Prostatic Hyperplasic ( BPH) flare-ups a few times a year. During these flare-ups, he drips blood from his enlarged prostate.

Bernese Mountain Dog

This only happens when he gets near a female dog in heat on her smell.

These flare-ups could be kept under control with Previcox to reduce the inflammation but my friend would prefer a solution that does not involve drugs.

They tried Saw Palmetto but that doesn't seem to help.

Has any of you have good experience with Proscar or Ovuban for treatment of this condition? 

Apparently, there have been people using either of these to shrink the prostate with no reported negative side effects. Please share whether you have positive or negative experience.

My friend's last two males suffered from the same condition but died within 12 months from being neutered; he'd like to avoid that this time around.

Any experiences and ideas are welcome.