Bear the dog started chewing on his penis a few weeks ago. We noticed that he seemed to be grooming the area excessively, and within a few days, he seemed very lethargic and I noticed that there was puss on the tip of his penis (which we now know is the "prepuce"). Took him to an emergency vet who put him in a cone and gave us antibiotics. That helped, but the area was still inflamed, so our regular vet gave us higher dose antibiotics, an anti fungal, and topical antibacterial drops.
With all those drugs, he was throwing up a lot, so the vet took him off of the antibiotics. But not the antifungal or the drops. The vet is pretty clear that he doesn't know what is wrong.
At no point have we noticed a change in urination.
It's now been three weeks and Bear is still super lethargic and he seems uncomfortable. His behavior is hard to describe but he is moping. He is barely willing to eat. He'll eat chicken, and hardcore treats (liver, bacon) but he's not interested in his usual food.
His prepuce is now a fairly healthy shade of pink, no puss, and no intense redness, but it is definitely swollen.
So my question is: are there other things we can do to make him more comfortable? And do you have any ideas about what might be going on? Spider bites? Cancer? STDs?
We're planning to take him to a new vet, but I'd like to come prepared to ask better questions. What should we be researching or asking the vet about?