What a beauty Gus is! Yes the t-shirt helped my dog post-histiocytoma removal; the incision was a bit above his armpit, perfect for scratching with the back foot, but he was somewhat inhibited by the shirt. When I had an elderly Springer with a skin infection, I bought her a few $8 sweaters online and let her tear those up (scratching) rather than her own skin. Biopsy results will probably be available early next week? Please do update, we'll be thinking of you!