two become one.

And whilst we are on the subject of Guinea pigs.

My brothers children have two 'pigs.
One dies.
First he tells the youngest. Who's eyes light up & out he runs because this is clearly the most exciting thing the guinea pig has ever done.

So, next he breaks the tragic news to the twins.
E: which one was it?
dad: (insert name of deceased rodent here)
E: Thats ok, that ones Mattie's.
M. Good. that means you can do all the cleaning out from now on.

so, no need for a special memorial meal there.