My boxer Mitsy is 6 years old. About 4 weeks ago she developed a small lump on her head. It was ugly and looked loke a wart. I didn't worry too much as it isnt bothering her at all. But in the last couple of days it has gotten bigger and tonight I noticed it is bleeding a little. it looks very red around the edges but still looks like a wart on top. I'm taking her the vet tomorrow but am terrified they will tell me it's cancerous. Has anyone had this problem before?
Anyway I have seen my share of histiocytomas. When reading your original post, my very first thought was a histiocytoma.