Pain all over, I need some help

My dad has had rectal cancer for 3 years. He had oral chemo and radiation, but that was it. He chose not to go through the colostomy and infusion chemo.

Since the new year started he's been mostly unable to walk. I wheel him to the bathroom. He tells me that even if I just touch him it hurts.

I know his cancer probably has spread. What does this mean though? Is he in the last stages? His breathing is strong.

I don't know what to do.