Did my friend make a mistake by not letting her remaining dog see the other dog's body after being PTS? It's been three months and the one remaining seems to be down a lot. I always did with mine. They understand death and I believe seeing the body helps with closure and understanding. Otherwise they might just think the dog disappeared or something.
My sister had brother and sister terriers , one died earlier this year at 16 1/2 , the other one didn’t see the body and has been perfectly ok since ( 17 in November) , so I would say it makes no odds at all .