Feline pine isn't too bad, wood is at least partially digestible and not highly toxic. I doubt it's the litter making him sick, which is one thing I wanted to eliminate.
I would do a month of Doxyclycline, JUST IN CASE. It certainly can't hurt anything, and if it is hemobart, that should cause an improvement (and if he imporves while on the treatment, you'll then know he had it). It often doesn't show up on the test anyways, so testing isn't always helpful. I think all anemic cats should be treated as if they HAVE hemobart, as it can't do any harm, but could save their life. Ask you vet if he/she would be willing to TRY it, you can point out that the alternative is euthanasia, and that should get him/her to agree that it's worth a "last ditch effort" try, even if he/she thinks it's unlikely. Science Diet is mostly CORN. Cats can't process the calories from corn, thus foods made from corn are practically useless for cats. Most cats do OK on them, because most cats have very easy to maintain weights (if anything, most cats tend towards obesity). But when you have a frail cat that is not keeping his weight, the very first thing you should do is feed the very best food you can, and that means a food with MEAT as the first two ingredients on the label. You didn't really answer my question.... so now that you know that the food you are feeding him for free is causing him harm, will you try to find a better food? Here are some links, please don't just take my word for it, do some research: http://www.fda.gov/cvm/petlabel.htm http://www.catnutrition.org/clienthandout.html http://www.thepetcenter.com/imtop/contrast.html http://www.thepetcenter.com/imtop/catsaredif.html http://cats.about.com/cs/catfood/a/ingredients.htm http://www.messybeast.com/cat-food-industry.htm http://cats.about.com/cs/nutrition/tp/premdrycatfood.htm Phaewryn http://ucat.us/domesticcatlinks.html Special Needs Cat Resources
