I second what Amos says about trying "tea tree" (melaleuca alternifolia) oil. (Not all organic treatments are harmless, of course, but melaleuca oil has been shown to have a wide array of amazing healing properties, and I know of no harmful side effects.)

I am so sorry to hear Angus's condition is so problematic, Jen. If we all visualize that sarcoma growing smaller and disappearing, maybe that will help. Angus is, indeed, a beloved Wunderhund!

{{{{{{{{{{{{{{{Angus}}}}}}}}}}}}}}}

Genie

PS, Sully, Angus is lucky to have a feline nursemaid like you.