I'm sorry to hear about your dog. We are going through the same thing at the moment wit our 7 year old spaniel, he has been in the vets on drips since Monday as he has an acute case. Iif it of any help to you here are a couple of websites I have found on this condition
http://home.comcast.net~joan.ogg_info.htm and www.vetnet.co.uk where there is a link to a discussion forum which appears to be for owners of dogs with AIHA (auto immune hemolytic anemia). I am still investgating this myself and it appears to be a useful forum
hope this is of some help
Jackie