Looking for advice/common experience with older rabbit

What about it?

So I’ve had Mr. Buns for over 8 years (white one) and I’m not sure how old he was when I got him (he was dumped off at a dog grooming business). About 5 months ago he developed a growth on his leg. At first I thought it was an abscess. I took him to the vet, learned it was a growth not an abscess, and he underwent surgery to remove it. Well, the growth came back (just like the vet said it might) and has since ruptured and bleeds periodically. Mr. Buns has had 3 surgeries (neutered, abscess removal, then growth removal) throughout his life and he’s pretty old. I can’t put him through another surgery. He seems to be okay, still cuddles and grooms his wife and eats but the thing on his leg is getting worse. He’s pretty much only inside now, he isn’t able to binky/run outside on my patio anymore. Has anyone had a senior bunny with this kind of problem before? I’m at a loss for what to do. Won’t share the pic because it’s graphic.

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