Poor Max, I'm so sorry your going through this trial. We did Neoplasene with Taffy and wouldn't do it again if presented with the same situation again. She had a tumor on the roof of her mouth which I discovered when looking for the cause of bad breath she had. And is often the case by the time you notice a lump it metazisises internally. Our vet covered the oral tumor with neoplasene, which by the next morning had fallen out, but then started the bleeding and lots of it. Also since there was internal mets she took a liquid neoplasene. We always had incidents of bleeding which got worse over time. Finally she had to be rushed to the vet when we couldn't stop bleeding. Then comes considering letting her go, vet could do no more, internally she was bleeding too and started vomiting blood, so that was the end for Taffy. Those lasts months were terrible for Taffy and I wouldn't put another dog through that. Especially a tumor on the roof of the mouth I wouldn't use it again. It is good for taking off growths on the skin like warts. Might use it for the one on his penis, but that might be uncomfortable for Max. Also you would have to find a vet trained to use it, we found a holistic vet willing to try it. She had to call dr Spencer for instructions how to do it. Unfortunately last I knew she no longer practices, burned out I think.