Smile you know my feelings about animals in general and I back up my feelings with my actions as a care giver for sick, abused and homeless animals so its not just talk with me. I think you have done all you can in this situation and since the cat can't be taken to Best Friends etc. and is undoubtedly in pain. Its time to put him to sleep, painlessly and quietly. I'm sure he would thank you for removing him from his wordly, old pained body. Please, think of him now and let him go. Its the kind thing to do for all involved. Do it now...