Years ago when I was a teenager, I had a Old English Sheepdog who wasn't spayed and who developed breast cancer(please always spay your dog before she's 3 - I speak from experience). She had a couple of lumpectomy operations and the first time she went in for surgery to remove several 'breasts" my mom converted a piece of lingerie into a cover for her chest which helped keep her stitches clean .... but it was much easier with an Old English because they don't have tails!
By the way, here's Gekko's* adoption sign from the SPCA:
...didn't they do a good job at pulling on our heart strings?
*I believe my SIL changed her name from Echo to Gekko
because my dog's name is Eco (pronounced "Eeek-o) and they were close sounding.
I'll have to verify that though, in case you're curious.