You can find several references on-line for the treatment of liver cancer in humans with urea.  Would imagine that finding urea in small quantities would be difficult to do, but urine, human or animal, is high in urea.  The first article below from The Townsend letter cites a couple of cases of liver cancer cured with urea.  The second article points to the same thing, as to do many other sites.  The last article talks about urine therapy (in this case, injection) as a cure for cancer and other conditions.  Again, if you search the Internet you will find that UT has cured cancer and that in fact people with cancer have less urea in their blood streams (that's where urine comes from) than those who don't.  There is even a standard urea breath test (UBT) that measures the urea in one's body and those with cancer have a lower UBT count than those who don't.

How you get the urea/urine into your dog, I don't know.  But I do know that dogs are known to drink it when it's available.

http://findarticles.com/p/articles/mi_m0ISW/is_268/ai_n15893086/print

Treating liver cancer with urea

I was more than pleased with the review by Alan Gaby MD that was in the Townsend Letter in the July 2005 issue, on treating liver cancer with oral urea. He had told of a report by Professor Evangelos Danopoulos of Athens Greece that was in Clinical Oncology in 1983.

I made contact with Professor Danopoulos in 1975 and we became dear friends until his death in 1995. In June of 1985, I had a phone call from a patient with colon cancer, Paul C of Singapore. He had had surgery for colon cancer and a large metastasis was found in the liver. His doctor had told him that he could be given chemotherapy which would do but little good and that he should expect death in six months.

I sent him 5 lbs. of urea from BioTech in Fayetteville, Arkansas by air. He took 15 grams of urea a day for one year and he was living a normal life with no symptoms at all. He had put 15 grams of urea in a quart of water and had divided the quart in seven equal portions, taking one portion every hour and a half during the waking day. He thought that his doctor would have an interest in his good fortune. His doctor did a liver scan and the tumor was the same as it had been a year before, His doctor said that this proved that urea was no good and he fixed it with customs to seize shipments of urea from the USA. Paul called me in great distress and I called Mallencrodt Chemical Company in St. Louis. They had an office and warehouse in Singapore. He could buy urea in Singapore.

He took urea for four more years and in 1990 a liver scan showed that the tumor was gone. He stopped taking urea then. I last heard from him in 2000. He was cured of his liver cancer.

In 1986, I had a call from a woman in Australia, R.E.V. who had breast cancer with a liver metastasis. She also had swelling in the area of the liver. Her oncologist told her that urea was a deadly poison. She found a woman doctor who called Danopoulos by phone. She took urea and she wrote that the swelling had subsided.

Here is a report by Danopoulos in Clinical Oncology 1983, 9, pp 89-90. Here was a hopeless patient with rectal cancer. The patient had a large tumor mass in the pelvic area. The rectum was blocked with many metastases in the liver. A colostomy was done. A 15% urea solution was infused into the colon through the colostomy tube and the patient was given 15 grams of urea each day. This treatment went on for a year at which time the patient was free of cancer.

We have over 50,000 deaths a year in the USA from colorectal cancer. This condition could change for the better if the medical establishment would begin to use urea in treating colorectal cancer.

Wayne Martin, BS ChE

25 Orchard Court

Fairhope, Alabama 36532 USA

http://www.health-science-spirit.com/urine.html

Benefits of Urea

Only recently has it been discovered that the concentration of urea in the blood has a key role in regulating at least 7 major pathways. Urea levels are low with cancer and many other diseases. The frequency of cancer and especially of multiple tumours and metastases increases greatly if urea levels are low.

Urea is not just a waste product or the end state of the protein metabolism as commonly assumed. Biochemical research has shown that urea, both from internal sources or externally supplied, is used by the body as a raw material to synthesise amino acids and proteins.

Urea Pioneer

The use of urea in cancer treatment was pioneered by E V Danopoulos, a Professor of Internal Medicine in Athens . Urea was notably effective with liver cancer and in preventing the development of metastases or secondary tumours. He used 45g of urea daily in 6 divided doses for 40 days and then 20g in 3 doses for 2 years. 45g correspond to 6 rounded teaspoons, while 20g are about 3 teaspoonfuls. The results were published in The Lancet in 1974.

But as it happens so often with discoverers of cheap cancer cures, Danopoulos lost his position after this publication and was forced to retire. Other research has shown that the effectiveness of urine in killing microbes depends largely on its concentration of urea and is better, the higher it is in urea.

http://www.universal-tao.com/article/therapy.html

"Dr. William Hitt, an American doctor who actually has urine therapy clinics in Mexico, has reported to me that he has treated 20,000 patients in a 2 ? year period with urine therapy injections. These patients include those with cancer, asthma and other diseases and also patients with severe alcoholism, drug and smoking addictions. Dr. Hitt reports startling success with no side effects in using urine infections for addictive disorders and also in combination with pre-scription. drugs. The amount of drugs or contaminants passed into urine is so infinitesimal that they pose no threat and, in fact, appear to act as vaccine-type agents which improve or cure these types of disorders."