Grandfather should still find someone to help him get over grieving. If you go to look at my website you will see my granddaughter was born with a bad kidney that was removed when she was 5 days old. She lost 1/3 of the other kidney just after her first birthday and the rest of it just after her second birthday. She was on dialysis for 14 weeks, having dialysis 5x a week 4 hours a time, before her kidney transplant. She was killed along with her mommy on the one year anniversary of the transplant. She was 3 years old, my first grandchild and I babysat for her 3 days a week.
I understand it is hard... I know you should still not be grieving so hard after 3 years. Thank you for your sympathy, I will guarantee my loss was just as painful as theirs. There are no easy losses... I am just stating that enough time has passed there should have been some healing and if there is not than someone needs to intervene and get grandpa some help.
Please feel free to click on the links in my sig, light a candle while you are there.