I took him to his vet appointment and they checked him out and deemed him not well enough for surgery. He had an antibiotic shot that's supposed to work for 14 days. If in that time he improves some, he can have another shot; if he improves even more, he can have his surgery then; if he improves not at all, we are out of options.
So if you can spare some vibes to send his way, I'm sure he would appreciate it. :)