This story gives me goose bumps. When our very loved Siamese cat, Woody, had to be euthanized a couple years ago at the age of 15, we brought him home in the box the vet had put him. It was a very sad day and there was not a dry eye in the house. Even his twin brother, Shadow, kept looking for him, but of course, had no way to understand what had just happened. Woody was very sick and his lungs had filled with a severe infection that could not be drained. Earlier trips to another vet did not reveal this infection that finally claimed his precious life.
By the time we found a vet who discovered it, it was too late. We brought Woody home and tenderly buried him in the back yard, under the lilac hedge where he used to love to crouch in hiding when the leaves were full, or to just lie in the sun, warming himself. It's his perfect spot.
Two years later, his beloved brother, Shadow, had to be put down, too. His kidneys finally failed completely and nothing could be done. He had been slowly deteriorating and was very thin and frail by then, too. They are now together under their lilac hedge.
Now for the weird part. During the two years that Woody was out there alone, no leaves fell over his grave, although many leaves have gathered there in the past. We have a lot of trees in our yard, and the leaves always swirled around and gathered under the lilac hedge. They still do, but they just didn't land on top of Woody's grave for two years. There was always a small, round clear spot, just the dirt that was shovelled over his burial box.
To add to the strangeness of this, no weeds or grass grew in that spot, either. It was always clear. And the other cats here (we have 4) never used the dirt for their litter-box activities. It stayed clean and clear, in other words.
This year, when Shadow finally joined his brother under the lilac hedge, at the age of 17, the grave site changed in character almost overnight. For one thing, all the cats started using the dirt for their bathroom, even neighborhood cats. Leaves immediately began gathering there, with no regard for the grave's location, as if it weren't there, or didn't matter anymore. And weeds are already growing in that dirt, too. It is rapidly fading into the background and reclaiming its original character of just being plain old dirt and grass and weeds under the lilac hedge. If I hadn't put a small headstone there, I wouldn't be able to tell exactly where the two, side-by-side graves are located.