My dog is very sick, antibiotics failed. Vet can't diagnose. Help!
There is not enough information here for me to properly help you. If a vet, in person, has not been able to help you I don't think us, over the internet without examining the dog or knowing the history, will be able to help you.
My recommendation would be to get a second opinion from another vet if your current vet is unable to help you. If he is unresponsive to antibiotic therapy the type of antibiotic may need to be changed or he may need to be on a couple antibiotics at the same time. Not to scare you but cancer is VERY common in Boxers and being that he is older and he is not responding to therapy I would have this a differential diagnosis. I don't know what diagnostic testing has been done (if any) but that is often important. If you don't allow any testing to be done the vet is only doing his/her best to guess what might help. Some things cannot be fixed without testing.
Regardless of all that, it sounds like his condition is very serious and that he may be suffering. If nothing can be figured out then you may need to consider humane euthanasia if his quality of life is not good. Of course, you know him best and I am just speculating but you should have that in the back of your mind if treatment is failing to cure him.
I am sorry you are going through this. I hope this was helpful. If you have more questions please feel free to ask again. Best wishes.
Updated on September 23rd, 2025