Jodie Salmon, 23, of Collingwood Road, Goring, was walking her dog near Chanctonbury Ring on Thursday, when she made the grizzly discovery.
Upon showing it to friends, speculation grew it could be a big cat.
She said: “At first, I thought it was a snake, but when I looked closer, I thought it could be a big cat.
“I am not sure how big it was, but would guess between five or six feet long.
“I would love it if it was a big cat, but I am not sure what it is.”
The Herald has approached three wildlife experts, who have yet to confirm the mystery beast’s identity.
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For the expert opinion, see the Herald, out Thursday, October 24.