Bob Hobden wrote:
It's foxes. On our last allotment site which were there were 6 allotments
taken out of 150+ we had two dens of foxes on the site and I dug up eggs,
both chicken and duck on occasions. We were next to the Swan Sanctuary so
that's probably where they came from. I also dug up two perfect but dirty
gammon slices which really gave me a turn, seeing red meat on the end of
your fork. One time we went down to the plot and were greeted by the head of
a dead rat looking at us, it was buried up to it's neck.

We had a large chunk of cooked chicken buried on ours one time. I thin
kyou're right about it being foxes.