Dukes

I have an 11 yrs old shepx that has a severe bacterial ear infection on top of a yeast infection. Because the infection is so bad, the vet prescribed Zenequin 200 mg tabs for 15 days, however the cost for the medicine is $197 which I can't afford on a fixed income after already spending over $100 on the visit, test, and an injection to help with the swelling in his ears. So now, I only have two options: 1)do nothing or 2) have him euthanized if the infection gets much worse and he shows signs of suffering. I choose not to do either. He seems happy, has a great appetite, and gets around well. I tried Doctorsfoster&smith.com but they only sell in large quantities and the cost is about the same. Need help to raise the $197.