Hi! This info was on the Rescue alliance group page... VERY good for anyone doing rescue... as well as anyone else wanting to economize on the cost of laundering their doggie stuff:

>> I have used the recipe below for homemade detergent in my front load
>> washer for almost a year now. It works very well and I have never added
>> anything to it. It is from www.soapsgonebuy.com
>>
>> Powdered Laundry Detergent (My favorite)
>>
>> 1 cup grated Fels Naptha Soap
>> 1/2 cup washing soda
>> 1/2 cup 20 mule team borax
>>
>> Mix and store in airtight container or bag. For light or small loads, use
>> 1 tablespoon. For normal loads, use 2 tablespoons. For heavy loads, use 3
>> tablespoons. Cost per load is about 15 cents.
>>
>> To make a large batch, grate 6 bars of Fels Naptha Soap and then add 3
>> cups of Washing Soda and 3 cups of 20 Mule Team Borax. Mix well and store in
>> covered container.
>>
>> The above recipes will not make suds in your washer so don't be alarmed.
>> Fels Naptha Soap is a pure soap and typically makes little or no suds in the
>> water. This makes it perfect for use in the new HE washers as well as
>> traditional washers. You will also notice the need to either reduce your
>> laundry softener, or in most cases, you can even eliminate the use of
>> softener completely.