Oh dear, I'm sorry to hear this. When my RB Puddy developed anemia, I started her on Epogen injections and she did improve, almost immediately. Have you talked to your vet about it? I gave her the injections myself, easy to do since they're under the skin, quick and painless. Also, B complex vitamins were injected right into the bag of Ringers that Puddy needed for her subQ's and that made a world of difference in her. Obviously, I don't know if you're already doing these things but, if not, perhaps have a discussion w/your vet. It couldn't hurt and in Puddy's case, it all definitely helped and improved her quality of life immensely. (((HUGS))) to you and praying that Filou will soon be back to his old self and that you'll have many good years yet w/him.