My father has stage 4 prostate cancer, and he's very secretive about his 'progress'. He's started his second round of chemo and now he is seeing his cancer specialist two days prior to his chemo session. I know the amount of chemo he is receiving has been reduced.

What does this normally inidicate? I'm sure it's standard procedure for something? He is starting to get a little pain in the legs (which I understand will get worse)