comforting a dying pig

Sadly when i came home from a holiday today, my darling guinea pig who was very loved was in a bad state, she couldn't walk, she cant make those little noises she did when i stoked her and she overall looked exhausted. I took her to the vets asap and they gave me a few options, i couldnt bare...

My female guinea pig bugsy (inspired from the Adam Sandler film bedtime stories) has been in my life for 6 years now, which I hear is really good because guinea pigs live for up to five years. We thought she would have passed away along time ago because she has this infected sore on her back...