Thanks Mike for the synopsis - I did go back and re read all the posts about Bing and Rosie. Idon't have a very retentive memory and this is why I find the forum so good in that you can review posts.
I can endorse Animal Health products that Vicki mentions. I use many of their products with a lot of success. Particularly Hormonise which helps to regulate hormones in the weeks before seasons. They have many horsey products too.
Hokamix too is good for fussy eaters but I wouldn't say that Rosie is actually fussy - it more sounds to me that she is regulating what she can digest. This may well suggest a liver problem.
Please don't give up on her - while she eats it suggests that she certainly hasn't given up.
My old bitch (Jewel) who is well on the way to 16 was seriously ill and even my vet thought that it was the end but she was eating well so I would not give up on her. I used homeopathy as well as conventional medicine and she has recovered. I also think you can read in their eyes when they themselves are ready to go.
Vicki, I don't think Chance is being fussy either - merely eating what he can digest well. Basenjis are particularly good at deciding what they can and can't eat.