Richard
Hi Vicki
From what you said your father's cancer seemed serious and late stage. It may be best to follow the doctor's advice.
However, to help him further with natural herbs or products, you might want to consider mushrooms. They have been used for many years for the treatment of cancer aside from mainstream medicine. I am aware of many people who recovered from early stage cancer (only certain kinds like colon, etc) through the use of mushroom. However, different people benefit differently.
A good blend of mushroom powder containing Maitake, Shiitake, Oyster, Wood Ear (Black Fungus), Cauliflower, Himmenmatustake, Reishi and Yun Zhi may help. These mushrooms would contain a high percentage of polysaccharide compound known as beta-glucan. The glucan is an active ingredient for stimulating or regulating the cellular immune system which will then stimulate the various immune cells primarily the T-cells and Macrophage to help counteract tumour cells without damaging normal cells. In Japan, the polysaccharide compound has been used in treating malignant tumours. The mushrooms may also help ease the discomforts of chemo for him too.
A very good probiotic may also boost the immune system and help combact other causes. It also puts the digestive system in proper order so that nutrients such as the above mushroom powder can be properly absorbed by the body. It will help eliminate all harmful and pathogenic bacteria.
If you wish more info, post your email and I will contact you.
Take care n I sincerely hope you find a good alternative treatment for your father soon.