Oh, for goodness sake, that is not skin cancer! Take a look at this, skin cancer does not look like that at all.
dog skin cancer - Yahoo Image Search Results
What is this dog eating?
It could be either a reaction to food, or, as was said above, mange, which can be easily treated. Please don't euthanize the dog, and see if you can find another veterinarian.
Better yet, get some medication in Australia and see if you can send it to her.
If you can't do that, have her try some of these natural remedies:
* A mixture of hydrogen peroxide and borax is one of the best remedies used for mange. However, be sure to not confuse borax with boric acid. Use one to two tablespoons of borax for every 500 cc of 1% hydrogen peroxide, making sure that it thoroughly dissolves. Bathe the dog in it once a week. Do not rinse off and do not wipe the dog dry. Let the solution dry naturally so that it can be absorbed by the skin. Please note that this treatment should not be used longer than a two month period.
* Regular bathing and brushing helps remove scaly skin and scabs.
* Colloidal silver is an excellent way of ridding the body of any type of infection. Apply topically to all affected areas, including the inside of the ears and also put in the dog's water daily.
* Acidophilus is effective in eliminating mange from inside the ears. Wash the inside of the ears with no more than two tablespoons of plain yogurt.
* Raw apple cider vinegar is effective when applied topically and when mixed in the dog's meal. One tablespoon mixed in his food should be sufficient.
* A couple of drops of olive oil applied to the mangy skin patches not only will soothe the irritated skin, but will also be effective in killing the mites.
* Drop a sliced lemon with the peels still left intact into boiling water and let steep overnight. Using a sponge, apply the mixture to the dog's coat.
* Honey has astonishing antiseptic, antioxidant, and cleansing qualities. Apply raw honey to affected areas.
* Make sure to wash all bedding and keep it as sterile as possible until the dog recovers.
Feeding a dog properly and adding dietary supplements is an important part of healing. A raw diet is strongly recommended, as it facilitates healing and is the best way to insure your pet's health.
Supplements that help alleviate itch and improve skin conditions are vitamin E, vitamin C, and fish oil.