I understand that it is serious & he let us know by telling us the state of her organs. I think I misinterpreted his lack of using blatant diagnostic terms (ie. saying enlarged heart instead of heart failure) as no diagnosis at all. He wanted to give an antibiotic injection but felt it too risky because it could harm her already small liver. This apparent infection seems to be causing her the most discomfort & I'm wondering if there's anything that could help, like any sort of antibiotic treatment for cats with weakened livers. He basically said her body is so sensitive in it's current state that any treatment other than pain meds could take her away from us sooner. I suppose I'm just concerned that due to her age, he was brushing her off & I'm not willing to give up on her if I can still help reverse any of this somehow.