Do you think there is any possibility of saving him? I'm not too worried if I can't. Should I cull him to end his suffering? I have pregnazone and menacyclene... Will the antibiotic fight it or will it just help in the meantime? I'm thinking he might have cancer, but I don't know.
Might be best just to euthanize him and ship him off to off to UC Davis for a free necropsy. I think he's probably too young for cancer. Poop looks like a bacterial infection to me.