that is a very old guinea pig, and to live that long she has had a very good and contented life full of love
now for your final act of love it is time to let it go and end the pain it is suffering
i ave been keeping animals for too many years and the hardest part is that they generally don't live as long as us, so their end days is something we generally have to face
make the kindest descision that is in the best interests of your pet
let it go