Hi , I'm James DVM MRCVS and would like to help you with your question
How long ago has your dog diet, and where is his body kept?
In order to perform a post mortem exam, Joop's body must be sent to a pathological center where a dog pathologist might examine it
I tend to use the queen mother hospital in London but there are other private institutions which can supply you with this service. All you need to do is ask your vet for help and he or she can do it for you
I hope this helps. If you have further questions, please ask.
All the best